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Finding the Fourth Proportional to 819,059.60, 1,228,589.40 and 772,403.60

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Solution

The fourth proportional to 819,059.60, 1,228,589.40 and 772,403.60 is: 1,158,605.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,059.60 : 1,228,589.40 = 772,403.60 : x
  2. Step 2: Convert to fraction form
    819,059.60/1,228,589.40 = 772,403.60/x
  3. Step 3: Cross multiply
    819,059.60x = 1,228,589.40 × 772,403.60
  4. Step 4: Simplify right side
    819,059.60x = 948,966,875,481.84
  5. Step 5: Solve for x
    x = 948,966,875,481.84/819,059.60
  6. Step 6: Final answer
    x = 1,158,605.40

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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.