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Finding the Fourth Proportional to 352,615.94, 528,920.24 and 86,377.84

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Solution

The fourth proportional to 352,615.94, 528,920.24 and 86,377.84 is: 129,565.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,615.94 : 528,920.24 = 86,377.84 : x
  2. Step 2: Convert to fraction form
    352,615.94/528,920.24 = 86,377.84/x
  3. Step 3: Cross multiply
    352,615.94x = 528,920.24 × 86,377.84
  4. Step 4: Simplify right side
    352,615.94x = 45,686,987,863.48
  5. Step 5: Solve for x
    x = 45,686,987,863.48/352,615.94
  6. Step 6: Final answer
    x = 129,565.86

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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.