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Finding the Fourth Proportional to 387,911.03, 581,842.91 and 185,650.92

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Solution

The fourth proportional to 387,911.03, 581,842.91 and 185,650.92 is: 278,465.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,911.03 : 581,842.91 = 185,650.92 : x
  2. Step 2: Convert to fraction form
    387,911.03/581,842.91 = 185,650.92/x
  3. Step 3: Cross multiply
    387,911.03x = 581,842.91 × 185,650.92
  4. Step 4: Simplify right side
    387,911.03x = 108,019,672,001.11
  5. Step 5: Solve for x
    x = 108,019,672,001.11/387,911.03
  6. Step 6: Final answer
    x = 278,465.07

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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.