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Finding the Fourth Proportional to 392,597.63, 542,121.53 and 379,902.10

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Solution

The fourth proportional to 392,597.63, 542,121.53 and 379,902.10 is: 524,590.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,597.63 : 542,121.53 = 379,902.10 : x
  2. Step 2: Convert to fraction form
    392,597.63/542,121.53 = 379,902.10/x
  3. Step 3: Cross multiply
    392,597.63x = 542,121.53 × 379,902.10
  4. Step 4: Simplify right side
    392,597.63x = 205,953,108,669.30
  5. Step 5: Solve for x
    x = 205,953,108,669.30/392,597.63
  6. Step 6: Final answer
    x = 524,590.80

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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.