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Finding the Fourth Proportional to 478,414.80, 717,622.20 and 268,025.40

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Solution

The fourth proportional to 478,414.80, 717,622.20 and 268,025.40 is: 402,038.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,414.80 : 717,622.20 = 268,025.40 : x
  2. Step 2: Convert to fraction form
    478,414.80/717,622.20 = 268,025.40/x
  3. Step 3: Cross multiply
    478,414.80x = 717,622.20 × 268,025.40
  4. Step 4: Simplify right side
    478,414.80x = 192,340,977,203.88
  5. Step 5: Solve for x
    x = 192,340,977,203.88/478,414.80
  6. Step 6: Final answer
    x = 402,038.10

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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.