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Finding the Fourth Proportional to 387,732.86, 535,030.54 and 215,622.94

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Solution

The fourth proportional to 387,732.86, 535,030.54 and 215,622.94 is: 297,536.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,732.86 : 535,030.54 = 215,622.94 : x
  2. Step 2: Convert to fraction form
    387,732.86/535,030.54 = 215,622.94/x
  3. Step 3: Cross multiply
    387,732.86x = 535,030.54 × 215,622.94
  4. Step 4: Simplify right side
    387,732.86x = 115,364,858,024.59
  5. Step 5: Solve for x
    x = 115,364,858,024.59/387,732.86
  6. Step 6: Final answer
    x = 297,536.96

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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.