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Finding the Fourth Proportional to 487,960.08, 672,181.74 and 415,129.71

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Solution

The fourth proportional to 487,960.08, 672,181.74 and 415,129.71 is: 571,855.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,960.08 : 672,181.74 = 415,129.71 : x
  2. Step 2: Convert to fraction form
    487,960.08/672,181.74 = 415,129.71/x
  3. Step 3: Cross multiply
    487,960.08x = 672,181.74 × 415,129.71
  4. Step 4: Simplify right side
    487,960.08x = 279,042,610,793.50
  5. Step 5: Solve for x
    x = 279,042,610,793.50/487,960.08
  6. Step 6: Final answer
    x = 571,855.41

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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.