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Finding the Fourth Proportional to 542,010.15, 812,128.30 and 328,129.79

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Solution

The fourth proportional to 542,010.15, 812,128.30 and 328,129.79 is: 491,657.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,010.15 : 812,128.30 = 328,129.79 : x
  2. Step 2: Convert to fraction form
    542,010.15/812,128.30 = 328,129.79/x
  3. Step 3: Cross multiply
    542,010.15x = 812,128.30 × 328,129.79
  4. Step 4: Simplify right side
    542,010.15x = 266,483,483,651.09
  5. Step 5: Solve for x
    x = 266,483,483,651.09/542,010.15
  6. Step 6: Final answer
    x = 491,657.74

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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.