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Finding the Fourth Proportional to 621,521.96, 857,691.68 and 349,590.04

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Solution

The fourth proportional to 621,521.96, 857,691.68 and 349,590.04 is: 482,429.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,521.96 : 857,691.68 = 349,590.04 : x
  2. Step 2: Convert to fraction form
    621,521.96/857,691.68 = 349,590.04/x
  3. Step 3: Cross multiply
    621,521.96x = 857,691.68 × 349,590.04
  4. Step 4: Simplify right side
    621,521.96x = 299,840,464,430.41
  5. Step 5: Solve for x
    x = 299,840,464,430.41/621,521.96
  6. Step 6: Final answer
    x = 482,429.40

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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.