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Finding the Fourth Proportional to 354,395.16, 531,436.68 and 129,697.20

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Solution

The fourth proportional to 354,395.16, 531,436.68 and 129,697.20 is: 194,488.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,395.16 : 531,436.68 = 129,697.20 : x
  2. Step 2: Convert to fraction form
    354,395.16/531,436.68 = 129,697.20/x
  3. Step 3: Cross multiply
    354,395.16x = 531,436.68 × 129,697.20
  4. Step 4: Simplify right side
    354,395.16x = 68,925,849,373.30
  5. Step 5: Solve for x
    x = 68,925,849,373.30/354,395.16
  6. Step 6: Final answer
    x = 194,488.69

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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.