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Finding the Fourth Proportional to 421,565.48, 581,781.66 and 249,582.20

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Solution

The fourth proportional to 421,565.48, 581,781.66 and 249,582.20 is: 344,436.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,565.48 : 581,781.66 = 249,582.20 : x
  2. Step 2: Convert to fraction form
    421,565.48/581,781.66 = 249,582.20/x
  3. Step 3: Cross multiply
    421,565.48x = 581,781.66 × 249,582.20
  4. Step 4: Simplify right side
    421,565.48x = 145,202,346,622.45
  5. Step 5: Solve for x
    x = 145,202,346,622.45/421,565.48
  6. Step 6: Final answer
    x = 344,436.04

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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.