Home / 831,617.40-1,247,426.10-515,047.80

Finding the Fourth Proportional to 831,617.40, 1,247,426.10 and 515,047.80

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Solution

The fourth proportional to 831,617.40, 1,247,426.10 and 515,047.80 is: 772,571.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,617.40 : 1,247,426.10 = 515,047.80 : x
  2. Step 2: Convert to fraction form
    831,617.40/1,247,426.10 = 515,047.80/x
  3. Step 3: Cross multiply
    831,617.40x = 1,247,426.10 × 515,047.80
  4. Step 4: Simplify right side
    831,617.40x = 642,484,068,467.58
  5. Step 5: Solve for x
    x = 642,484,068,467.58/831,617.40
  6. Step 6: Final answer
    x = 772,571.70

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.