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Finding the Fourth Proportional to 478,423.80, 717,635.70 and 402,316.20

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Solution

The fourth proportional to 478,423.80, 717,635.70 and 402,316.20 is: 603,474.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,423.80 : 717,635.70 = 402,316.20 : x
  2. Step 2: Convert to fraction form
    478,423.80/717,635.70 = 402,316.20/x
  3. Step 3: Cross multiply
    478,423.80x = 717,635.70 × 402,316.20
  4. Step 4: Simplify right side
    478,423.80x = 288,716,467,808.34
  5. Step 5: Solve for x
    x = 288,716,467,808.34/478,423.80
  6. Step 6: Final answer
    x = 603,474.30

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Similar ratio
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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.