Home / 579,489.20-869,233.80-402,342.20

Finding the Fourth Proportional to 579,489.20, 869,233.80 and 402,342.20

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Solution

The fourth proportional to 579,489.20, 869,233.80 and 402,342.20 is: 603,513.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,489.20 : 869,233.80 = 402,342.20 : x
  2. Step 2: Convert to fraction form
    579,489.20/869,233.80 = 402,342.20/x
  3. Step 3: Cross multiply
    579,489.20x = 869,233.80 × 402,342.20
  4. Step 4: Simplify right side
    579,489.20x = 349,729,439,406.36
  5. Step 5: Solve for x
    x = 349,729,439,406.36/579,489.20
  6. Step 6: Final answer
    x = 603,513.30

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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.