Home / 820,131.40-1,230,197.10-503,561.80

Finding the Fourth Proportional to 820,131.40, 1,230,197.10 and 503,561.80

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Solution

The fourth proportional to 820,131.40, 1,230,197.10 and 503,561.80 is: 755,342.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,131.40 : 1,230,197.10 = 503,561.80 : x
  2. Step 2: Convert to fraction form
    820,131.40/1,230,197.10 = 503,561.80/x
  3. Step 3: Cross multiply
    820,131.40x = 1,230,197.10 × 503,561.80
  4. Step 4: Simplify right side
    820,131.40x = 619,480,266,030.78
  5. Step 5: Solve for x
    x = 619,480,266,030.78/820,131.40
  6. Step 6: Final answer
    x = 755,342.70

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Double scale
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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.