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Finding the Fourth Proportional to 316,643.60, 474,562.20 and 129,443.60

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Solution

The fourth proportional to 316,643.60, 474,562.20 and 129,443.60 is: 194,000.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,643.60 : 474,562.20 = 129,443.60 : x
  2. Step 2: Convert to fraction form
    316,643.60/474,562.20 = 129,443.60/x
  3. Step 3: Cross multiply
    316,643.60x = 474,562.20 × 129,443.60
  4. Step 4: Simplify right side
    316,643.60x = 61,429,039,591.92
  5. Step 5: Solve for x
    x = 61,429,039,591.92/316,643.60
  6. Step 6: Final answer
    x = 194,000.57

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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.