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Finding the Fourth Proportional to 258,358.59, 387,328.77 and 80,774.19

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Solution

The fourth proportional to 258,358.59, 387,328.77 and 80,774.19 is: 121,095.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,358.59 : 387,328.77 = 80,774.19 : x
  2. Step 2: Convert to fraction form
    258,358.59/387,328.77 = 80,774.19/x
  3. Step 3: Cross multiply
    258,358.59x = 387,328.77 × 80,774.19
  4. Step 4: Simplify right side
    258,358.59x = 31,286,167,660.45
  5. Step 5: Solve for x
    x = 31,286,167,660.45/258,358.59
  6. Step 6: Final answer
    x = 121,095.91

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1.5x scale

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.