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Finding the Fourth Proportional to 487,908.40, 731,862.60 and 188,402.80

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Solution

The fourth proportional to 487,908.40, 731,862.60 and 188,402.80 is: 282,604.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,908.40 : 731,862.60 = 188,402.80 : x
  2. Step 2: Convert to fraction form
    487,908.40/731,862.60 = 188,402.80/x
  3. Step 3: Cross multiply
    487,908.40x = 731,862.60 × 188,402.80
  4. Step 4: Simplify right side
    487,908.40x = 137,884,963,055.28
  5. Step 5: Solve for x
    x = 137,884,963,055.28/487,908.40
  6. Step 6: Final answer
    x = 282,604.20

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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.