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Finding the Fourth Proportional to 579,633.20, 869,449.80 and 402,486.20

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Solution

The fourth proportional to 579,633.20, 869,449.80 and 402,486.20 is: 603,729.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,633.20 : 869,449.80 = 402,486.20 : x
  2. Step 2: Convert to fraction form
    579,633.20/869,449.80 = 402,486.20/x
  3. Step 3: Cross multiply
    579,633.20x = 869,449.80 × 402,486.20
  4. Step 4: Simplify right side
    579,633.20x = 349,941,546,092.76
  5. Step 5: Solve for x
    x = 349,941,546,092.76/579,633.20
  6. Step 6: Final answer
    x = 603,729.30

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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.