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Finding the Fourth Proportional to 615,031.80, 922,547.70 and 415,966.20

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Solution

The fourth proportional to 615,031.80, 922,547.70 and 415,966.20 is: 623,949.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,031.80 : 922,547.70 = 415,966.20 : x
  2. Step 2: Convert to fraction form
    615,031.80/922,547.70 = 415,966.20/x
  3. Step 3: Cross multiply
    615,031.80x = 922,547.70 × 415,966.20
  4. Step 4: Simplify right side
    615,031.80x = 383,748,661,087.74
  5. Step 5: Solve for x
    x = 383,748,661,087.74/615,031.80
  6. Step 6: Final answer
    x = 623,949.30

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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.