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Finding the Fourth Proportional to 657,072.80, 985,220.40 and 342,144.80

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Solution

The fourth proportional to 657,072.80, 985,220.40 and 342,144.80 is: 513,014.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,072.80 : 985,220.40 = 342,144.80 : x
  2. Step 2: Convert to fraction form
    657,072.80/985,220.40 = 342,144.80/x
  3. Step 3: Cross multiply
    657,072.80x = 985,220.40 × 342,144.80
  4. Step 4: Simplify right side
    657,072.80x = 337,088,036,713.92
  5. Step 5: Solve for x
    x = 337,088,036,713.92/657,072.80
  6. Step 6: Final answer
    x = 513,014.75

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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.