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Finding the Fourth Proportional to 572,641.34, 789,881.78 and 351,781.89

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Solution

The fourth proportional to 572,641.34, 789,881.78 and 351,781.89 is: 485,235.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,641.34 : 789,881.78 = 351,781.89 : x
  2. Step 2: Convert to fraction form
    572,641.34/789,881.78 = 351,781.89/x
  3. Step 3: Cross multiply
    572,641.34x = 789,881.78 × 351,781.89
  4. Step 4: Simplify right side
    572,641.34x = 277,866,103,686.06
  5. Step 5: Solve for x
    x = 277,866,103,686.06/572,641.34
  6. Step 6: Final answer
    x = 485,235.85

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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.