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Finding the Fourth Proportional to 572,145.90, 858,607.65 and 319,425.90

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Solution

The fourth proportional to 572,145.90, 858,607.65 and 319,425.90 is: 479,355.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,145.90 : 858,607.65 = 319,425.90 : x
  2. Step 2: Convert to fraction form
    572,145.90/858,607.65 = 319,425.90/x
  3. Step 3: Cross multiply
    572,145.90x = 858,607.65 × 319,425.90
  4. Step 4: Simplify right side
    572,145.90x = 274,261,521,348.14
  5. Step 5: Solve for x
    x = 274,261,521,348.14/572,145.90
  6. Step 6: Final answer
    x = 479,355.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.