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Finding the Fourth Proportional to 479,404.80, 717,985.92 and 378,890.40

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Solution

The fourth proportional to 479,404.80, 717,985.92 and 378,890.40 is: 567,449.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,404.80 : 717,985.92 = 378,890.40 : x
  2. Step 2: Convert to fraction form
    479,404.80/717,985.92 = 378,890.40/x
  3. Step 3: Cross multiply
    479,404.80x = 717,985.92 × 378,890.40
  4. Step 4: Simplify right side
    479,404.80x = 272,037,972,423.17
  5. Step 5: Solve for x
    x = 272,037,972,423.17/479,404.80
  6. Step 6: Final answer
    x = 567,449.41

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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.