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Finding the Fourth Proportional to 615,955.20, 923,932.80 and 426,998.40

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Solution

The fourth proportional to 615,955.20, 923,932.80 and 426,998.40 is: 640,497.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,955.20 : 923,932.80 = 426,998.40 : x
  2. Step 2: Convert to fraction form
    615,955.20/923,932.80 = 426,998.40/x
  3. Step 3: Cross multiply
    615,955.20x = 923,932.80 × 426,998.40
  4. Step 4: Simplify right side
    615,955.20x = 394,517,827,307.52
  5. Step 5: Solve for x
    x = 394,517,827,307.52/615,955.20
  6. Step 6: Final answer
    x = 640,497.60

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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.