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Finding the Fourth Proportional to 572,061.90, 857,108.70 and 372,279.45

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Solution

The fourth proportional to 572,061.90, 857,108.70 and 372,279.45 is: 557,778.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,061.90 : 857,108.70 = 372,279.45 : x
  2. Step 2: Convert to fraction form
    572,061.90/857,108.70 = 372,279.45/x
  3. Step 3: Cross multiply
    572,061.90x = 857,108.70 × 372,279.45
  4. Step 4: Simplify right side
    572,061.90x = 319,083,955,426.22
  5. Step 5: Solve for x
    x = 319,083,955,426.22/572,061.90
  6. Step 6: Final answer
    x = 557,778.72

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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.