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Finding the Fourth Proportional to 615,134.60, 922,701.90 and 515,407.40

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Solution

The fourth proportional to 615,134.60, 922,701.90 and 515,407.40 is: 773,111.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,134.60 : 922,701.90 = 515,407.40 : x
  2. Step 2: Convert to fraction form
    615,134.60/922,701.90 = 515,407.40/x
  3. Step 3: Cross multiply
    615,134.60x = 922,701.90 × 515,407.40
  4. Step 4: Simplify right side
    615,134.60x = 475,567,387,254.06
  5. Step 5: Solve for x
    x = 475,567,387,254.06/615,134.60
  6. Step 6: Final answer
    x = 773,111.10

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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.