Home / 820,610.40-1,230,915.60-671,311.20

Finding the Fourth Proportional to 820,610.40, 1,230,915.60 and 671,311.20

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Solution

The fourth proportional to 820,610.40, 1,230,915.60 and 671,311.20 is: 1,006,966.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,610.40 : 1,230,915.60 = 671,311.20 : x
  2. Step 2: Convert to fraction form
    820,610.40/1,230,915.60 = 671,311.20/x
  3. Step 3: Cross multiply
    820,610.40x = 1,230,915.60 × 671,311.20
  4. Step 4: Simplify right side
    820,610.40x = 826,327,428,534.72
  5. Step 5: Solve for x
    x = 826,327,428,534.72/820,610.40
  6. Step 6: Final answer
    x = 1,006,966.80

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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.