Home / 803,999.70-1,205,999.55-426,086.10

Finding the Fourth Proportional to 803,999.70, 1,205,999.55 and 426,086.10

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Solution

The fourth proportional to 803,999.70, 1,205,999.55 and 426,086.10 is: 639,129.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    803,999.70 : 1,205,999.55 = 426,086.10 : x
  2. Step 2: Convert to fraction form
    803,999.70/1,205,999.55 = 426,086.10/x
  3. Step 3: Cross multiply
    803,999.70x = 1,205,999.55 × 426,086.10
  4. Step 4: Simplify right side
    803,999.70x = 513,859,644,861.26
  5. Step 5: Solve for x
    x = 513,859,644,861.26/803,999.70
  6. Step 6: Final answer
    x = 639,129.15

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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.