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Finding the Fourth Proportional to 831,802.76, 1,147,879.01 and 469,344.57

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Solution

The fourth proportional to 831,802.76, 1,147,879.01 and 469,344.57 is: 647,690.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,802.76 : 1,147,879.01 = 469,344.57 : x
  2. Step 2: Convert to fraction form
    831,802.76/1,147,879.01 = 469,344.57/x
  3. Step 3: Cross multiply
    831,802.76x = 1,147,879.01 × 469,344.57
  4. Step 4: Simplify right side
    831,802.76x = 538,750,780,360.48
  5. Step 5: Solve for x
    x = 538,750,780,360.48/831,802.76
  6. Step 6: Final answer
    x = 647,690.54

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.