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Finding the Fourth Proportional to 387,349.47, 534,541.41 and 215,266.86

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Solution

The fourth proportional to 387,349.47, 534,541.41 and 215,266.86 is: 297,067.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,349.47 : 534,541.41 = 215,266.86 : x
  2. Step 2: Convert to fraction form
    387,349.47/534,541.41 = 215,266.86/x
  3. Step 3: Cross multiply
    387,349.47x = 534,541.41 × 215,266.86
  4. Step 4: Simplify right side
    387,349.47x = 115,069,050,870.67
  5. Step 5: Solve for x
    x = 115,069,050,870.67/387,349.47
  6. Step 6: Final answer
    x = 297,067.79

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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.