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Finding the Fourth Proportional to 316,637.70, 474,956.55 and 129,783.30

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Solution

The fourth proportional to 316,637.70, 474,956.55 and 129,783.30 is: 194,674.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,637.70 : 474,956.55 = 129,783.30 : x
  2. Step 2: Convert to fraction form
    316,637.70/474,956.55 = 129,783.30/x
  3. Step 3: Cross multiply
    316,637.70x = 474,956.55 × 129,783.30
  4. Step 4: Simplify right side
    316,637.70x = 61,641,428,415.62
  5. Step 5: Solve for x
    x = 61,641,428,415.62/316,637.70
  6. Step 6: Final answer
    x = 194,674.95

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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.