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Finding the Fourth Proportional to 387,085.62, 580,480.35 and 127,362.75

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Solution

The fourth proportional to 387,085.62, 580,480.35 and 127,362.75 is: 190,995.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,085.62 : 580,480.35 = 127,362.75 : x
  2. Step 2: Convert to fraction form
    387,085.62/580,480.35 = 127,362.75/x
  3. Step 3: Cross multiply
    387,085.62x = 580,480.35 × 127,362.75
  4. Step 4: Simplify right side
    387,085.62x = 73,931,573,696.96
  5. Step 5: Solve for x
    x = 73,931,573,696.96/387,085.62
  6. Step 6: Final answer
    x = 190,995.40

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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.