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Finding the Fourth Proportional to 323,560.10, 485,340.15 and 266,479.40

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Solution

The fourth proportional to 323,560.10, 485,340.15 and 266,479.40 is: 399,719.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,560.10 : 485,340.15 = 266,479.40 : x
  2. Step 2: Convert to fraction form
    323,560.10/485,340.15 = 266,479.40/x
  3. Step 3: Cross multiply
    323,560.10x = 485,340.15 × 266,479.40
  4. Step 4: Simplify right side
    323,560.10x = 129,333,151,967.91
  5. Step 5: Solve for x
    x = 129,333,151,967.91/323,560.10
  6. Step 6: Final answer
    x = 399,719.10

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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.