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Finding the Fourth Proportional to 487,818.92, 672,742.87 and 418,884.98

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Solution

The fourth proportional to 487,818.92, 672,742.87 and 418,884.98 is: 577,677.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,818.92 : 672,742.87 = 418,884.98 : x
  2. Step 2: Convert to fraction form
    487,818.92/672,742.87 = 418,884.98/x
  3. Step 3: Cross multiply
    487,818.92x = 672,742.87 × 418,884.98
  4. Step 4: Simplify right side
    487,818.92x = 281,801,879,234.17
  5. Step 5: Solve for x
    x = 281,801,879,234.17/487,818.92
  6. Step 6: Final answer
    x = 577,677.22

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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.