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Finding the Fourth Proportional to 258,320.68, 387,470.20 and 89,879.12

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Solution

The fourth proportional to 258,320.68, 387,470.20 and 89,879.12 is: 134,814.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,320.68 : 387,470.20 = 89,879.12 : x
  2. Step 2: Convert to fraction form
    258,320.68/387,470.20 = 89,879.12/x
  3. Step 3: Cross multiply
    258,320.68x = 387,470.20 × 89,879.12
  4. Step 4: Simplify right side
    258,320.68x = 34,825,480,602.22
  5. Step 5: Solve for x
    x = 34,825,480,602.22/258,320.68
  6. Step 6: Final answer
    x = 134,814.92

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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.