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Finding the Fourth Proportional to 1,130.39, 1,695.36 and 308.45

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Solution

The fourth proportional to 1,130.39, 1,695.36 and 308.45 is: 462.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.39 : 1,695.36 = 308.45 : x
  2. Step 2: Convert to fraction form
    1,130.39/1,695.36 = 308.45/x
  3. Step 3: Cross multiply
    1,130.39x = 1,695.36 × 308.45
  4. Step 4: Simplify right side
    1,130.39x = 522,933.79
  5. Step 5: Solve for x
    x = 522,933.79/1,130.39
  6. Step 6: Final answer
    x = 462.61

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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.