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Finding the Fourth Proportional to 717,373.20, 990,000.32 and 395,107.76

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Solution

The fourth proportional to 717,373.20, 990,000.32 and 395,107.76 is: 545,262.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,373.20 : 990,000.32 = 395,107.76 : x
  2. Step 2: Convert to fraction form
    717,373.20/990,000.32 = 395,107.76/x
  3. Step 3: Cross multiply
    717,373.20x = 990,000.32 × 395,107.76
  4. Step 4: Simplify right side
    717,373.20x = 391,156,808,834.48
  5. Step 5: Solve for x
    x = 391,156,808,834.48/717,373.20
  6. Step 6: Final answer
    x = 545,262.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.