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Finding the Fourth Proportional to 579,486.20, 869,229.30 and 402,339.20

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Solution

The fourth proportional to 579,486.20, 869,229.30 and 402,339.20 is: 603,508.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,486.20 : 869,229.30 = 402,339.20 : x
  2. Step 2: Convert to fraction form
    579,486.20/869,229.30 = 402,339.20/x
  3. Step 3: Cross multiply
    579,486.20x = 869,229.30 × 402,339.20
  4. Step 4: Simplify right side
    579,486.20x = 349,725,021,178.56
  5. Step 5: Solve for x
    x = 349,725,021,178.56/579,486.20
  6. Step 6: Final answer
    x = 603,508.80

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Double scale
Find fourth proportional to 579,487.20, 869,230.80 and 402,340.20
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.