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Finding the Fourth Proportional to 387,804.90, 581,707.52 and 121,586.17

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Solution

The fourth proportional to 387,804.90, 581,707.52 and 121,586.17 is: 182,379.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,804.90 : 581,707.52 = 121,586.17 : x
  2. Step 2: Convert to fraction form
    387,804.90/581,707.52 = 121,586.17/x
  3. Step 3: Cross multiply
    387,804.90x = 581,707.52 × 121,586.17
  4. Step 4: Simplify right side
    387,804.90x = 70,727,587,354.80
  5. Step 5: Solve for x
    x = 70,727,587,354.80/387,804.90
  6. Step 6: Final answer
    x = 182,379.30

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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.