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Finding the Fourth Proportional to 672,902.30, 928,625.91 and 386,479.82

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Solution

The fourth proportional to 672,902.30, 928,625.91 and 386,479.82 is: 533,354.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,902.30 : 928,625.91 = 386,479.82 : x
  2. Step 2: Convert to fraction form
    672,902.30/928,625.91 = 386,479.82/x
  3. Step 3: Cross multiply
    672,902.30x = 928,625.91 × 386,479.82
  4. Step 4: Simplify right side
    672,902.30x = 358,895,174,544.14
  5. Step 5: Solve for x
    x = 358,895,174,544.14/672,902.30
  6. Step 6: Final answer
    x = 533,354.06

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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.