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Finding the Fourth Proportional to 873.12, 1,310.22 and 508.62

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Solution

The fourth proportional to 873.12, 1,310.22 and 508.62 is: 763.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.12 : 1,310.22 = 508.62 : x
  2. Step 2: Convert to fraction form
    873.12/1,310.22 = 508.62/x
  3. Step 3: Cross multiply
    873.12x = 1,310.22 × 508.62
  4. Step 4: Simplify right side
    873.12x = 666,404.10
  5. Step 5: Solve for x
    x = 666,404.10/873.12
  6. Step 6: Final answer
    x = 763.24

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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.