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Finding the Fourth Proportional to 1,130.55, 1,695.82 and 308.80

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Solution

The fourth proportional to 1,130.55, 1,695.82 and 308.80 is: 463.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.55 : 1,695.82 = 308.80 : x
  2. Step 2: Convert to fraction form
    1,130.55/1,695.82 = 308.80/x
  3. Step 3: Cross multiply
    1,130.55x = 1,695.82 × 308.80
  4. Step 4: Simplify right side
    1,130.55x = 523,669.22
  5. Step 5: Solve for x
    x = 523,669.22/1,130.55
  6. Step 6: Final answer
    x = 463.20

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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.