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Finding the Fourth Proportional to 1,130.49, 1,695.72 and 308.79

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Solution

The fourth proportional to 1,130.49, 1,695.72 and 308.79 is: 463.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.49 : 1,695.72 = 308.79 : x
  2. Step 2: Convert to fraction form
    1,130.49/1,695.72 = 308.79/x
  3. Step 3: Cross multiply
    1,130.49x = 1,695.72 × 308.79
  4. Step 4: Simplify right side
    1,130.49x = 523,621.38
  5. Step 5: Solve for x
    x = 523,621.38/1,130.49
  6. Step 6: Final answer
    x = 463.18

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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.