Home / 890,003.89-1,228,180.05-522,475.12

Finding the Fourth Proportional to 890,003.89, 1,228,180.05 and 522,475.12

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Solution

The fourth proportional to 890,003.89, 1,228,180.05 and 522,475.12 is: 721,000.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,003.89 : 1,228,180.05 = 522,475.12 : x
  2. Step 2: Convert to fraction form
    890,003.89/1,228,180.05 = 522,475.12/x
  3. Step 3: Cross multiply
    890,003.89x = 1,228,180.05 × 522,475.12
  4. Step 4: Simplify right side
    890,003.89x = 641,693,515,934.91
  5. Step 5: Solve for x
    x = 641,693,515,934.91/890,003.89
  6. Step 6: Final answer
    x = 721,000.80

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.