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Finding the Fourth Proportional to 255,358.13, 383,110.27 and 86,915.57

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Solution

The fourth proportional to 255,358.13, 383,110.27 and 86,915.57 is: 130,398.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,358.13 : 383,110.27 = 86,915.57 : x
  2. Step 2: Convert to fraction form
    255,358.13/383,110.27 = 86,915.57/x
  3. Step 3: Cross multiply
    255,358.13x = 383,110.27 × 86,915.57
  4. Step 4: Simplify right side
    255,358.13x = 33,298,245,574.35
  5. Step 5: Solve for x
    x = 33,298,245,574.35/255,358.13
  6. Step 6: Final answer
    x = 130,398.22

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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.