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Finding the Fourth Proportional to 672,746.32, 928,864.20 and 431,650

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Solution

The fourth proportional to 672,746.32, 928,864.20 and 431,650 is: 595,981.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,746.32 : 928,864.20 = 431,650 : x
  2. Step 2: Convert to fraction form
    672,746.32/928,864.20 = 431,650/x
  3. Step 3: Cross multiply
    672,746.32x = 928,864.20 × 431,650
  4. Step 4: Simplify right side
    672,746.32x = 400,944,231,930
  5. Step 5: Solve for x
    x = 400,944,231,930/672,746.32
  6. Step 6: Final answer
    x = 595,981.31

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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.