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Finding the Fourth Proportional to 1,330.60, 1,995.28 and 714.20

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Solution

The fourth proportional to 1,330.60, 1,995.28 and 714.20 is: 1,070.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.60 : 1,995.28 = 714.20 : x
  2. Step 2: Convert to fraction form
    1,330.60/1,995.28 = 714.20/x
  3. Step 3: Cross multiply
    1,330.60x = 1,995.28 × 714.20
  4. Step 4: Simplify right side
    1,330.60x = 1,425,028.98
  5. Step 5: Solve for x
    x = 1,425,028.98/1,330.60
  6. Step 6: Final answer
    x = 1,070.97

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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.