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Finding the Fourth Proportional to 657,131.20, 985,696.80 and 342,203.20

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Solution

The fourth proportional to 657,131.20, 985,696.80 and 342,203.20 is: 513,304.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,131.20 : 985,696.80 = 342,203.20 : x
  2. Step 2: Convert to fraction form
    657,131.20/985,696.80 = 342,203.20/x
  3. Step 3: Cross multiply
    657,131.20x = 985,696.80 × 342,203.20
  4. Step 4: Simplify right side
    657,131.20x = 337,308,599,189.76
  5. Step 5: Solve for x
    x = 337,308,599,189.76/657,131.20
  6. Step 6: Final answer
    x = 513,304.80

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Similar ratio
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1.5x scale

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.