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Finding the Fourth Proportional to 1,592.64, 2,390.40 and 1,080

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Solution

The fourth proportional to 1,592.64, 2,390.40 and 1,080 is: 1,620.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,592.64 : 2,390.40 = 1,080 : x
  2. Step 2: Convert to fraction form
    1,592.64/2,390.40 = 1,080/x
  3. Step 3: Cross multiply
    1,592.64x = 2,390.40 × 1,080
  4. Step 4: Simplify right side
    1,592.64x = 2,581,632
  5. Step 5: Solve for x
    x = 2,581,632/1,592.64
  6. Step 6: Final answer
    x = 1,620.98

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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.