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Finding the Fourth Proportional to 1,130.11, 1,695.28 and 308.39

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Solution

The fourth proportional to 1,130.11, 1,695.28 and 308.39 is: 462.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.11 : 1,695.28 = 308.39 : x
  2. Step 2: Convert to fraction form
    1,130.11/1,695.28 = 308.39/x
  3. Step 3: Cross multiply
    1,130.11x = 1,695.28 × 308.39
  4. Step 4: Simplify right side
    1,130.11x = 522,807.40
  5. Step 5: Solve for x
    x = 522,807.40/1,130.11
  6. Step 6: Final answer
    x = 462.62

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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.