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Finding the Fourth Proportional to 630,446.90, 870,337.78 and 486,884.66

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Solution

The fourth proportional to 630,446.90, 870,337.78 and 486,884.66 is: 672,148.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,446.90 : 870,337.78 = 486,884.66 : x
  2. Step 2: Convert to fraction form
    630,446.90/870,337.78 = 486,884.66/x
  3. Step 3: Cross multiply
    630,446.90x = 870,337.78 × 486,884.66
  4. Step 4: Simplify right side
    630,446.90x = 423,754,108,531.55
  5. Step 5: Solve for x
    x = 423,754,108,531.55/630,446.90
  6. Step 6: Final answer
    x = 672,148.78

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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.