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Finding the Fourth Proportional to 478,508.20, 717,416.70 and 268,210.60

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Solution

The fourth proportional to 478,508.20, 717,416.70 and 268,210.60 is: 402,122.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,508.20 : 717,416.70 = 268,210.60 : x
  2. Step 2: Convert to fraction form
    478,508.20/717,416.70 = 268,210.60/x
  3. Step 3: Cross multiply
    478,508.20x = 717,416.70 × 268,210.60
  4. Step 4: Simplify right side
    478,508.20x = 192,418,763,557.02
  5. Step 5: Solve for x
    x = 192,418,763,557.02/478,508.20
  6. Step 6: Final answer
    x = 402,122.19

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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.