Home / 820,145.40-1,230,218.10-503,575.80

Finding the Fourth Proportional to 820,145.40, 1,230,218.10 and 503,575.80

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Solution

The fourth proportional to 820,145.40, 1,230,218.10 and 503,575.80 is: 755,363.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,145.40 : 1,230,218.10 = 503,575.80 : x
  2. Step 2: Convert to fraction form
    820,145.40/1,230,218.10 = 503,575.80/x
  3. Step 3: Cross multiply
    820,145.40x = 1,230,218.10 × 503,575.80
  4. Step 4: Simplify right side
    820,145.40x = 619,508,063,881.98
  5. Step 5: Solve for x
    x = 619,508,063,881.98/820,145.40
  6. Step 6: Final answer
    x = 755,363.70

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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.