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Finding the Fourth Proportional to 487,510.53, 731,268.09 and 127,680.63

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Solution

The fourth proportional to 487,510.53, 731,268.09 and 127,680.63 is: 191,521.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,510.53 : 731,268.09 = 127,680.63 : x
  2. Step 2: Convert to fraction form
    487,510.53/731,268.09 = 127,680.63/x
  3. Step 3: Cross multiply
    487,510.53x = 731,268.09 × 127,680.63
  4. Step 4: Simplify right side
    487,510.53x = 93,368,770,430.10
  5. Step 5: Solve for x
    x = 93,368,770,430.10/487,510.53
  6. Step 6: Final answer
    x = 191,521.55

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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.