Home / 387,489.28-581,235.78-117,619.75

Finding the Fourth Proportional to 387,489.28, 581,235.78 and 117,619.75

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Solution

The fourth proportional to 387,489.28, 581,235.78 and 117,619.75 is: 176,430.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,489.28 : 581,235.78 = 117,619.75 : x
  2. Step 2: Convert to fraction form
    387,489.28/581,235.78 = 117,619.75/x
  3. Step 3: Cross multiply
    387,489.28x = 581,235.78 × 117,619.75
  4. Step 4: Simplify right side
    387,489.28x = 68,364,807,134.66
  5. Step 5: Solve for x
    x = 68,364,807,134.66/387,489.28
  6. Step 6: Final answer
    x = 176,430.19

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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.