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Finding the Fourth Proportional to 255,707.18, 383,766.21 and 115,478.06

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Solution

The fourth proportional to 255,707.18, 383,766.21 and 115,478.06 is: 173,309.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,707.18 : 383,766.21 = 115,478.06 : x
  2. Step 2: Convert to fraction form
    255,707.18/383,766.21 = 115,478.06/x
  3. Step 3: Cross multiply
    255,707.18x = 383,766.21 × 115,478.06
  4. Step 4: Simplify right side
    255,707.18x = 44,316,577,424.35
  5. Step 5: Solve for x
    x = 44,316,577,424.35/255,707.18
  6. Step 6: Final answer
    x = 173,309.87

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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.