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Finding the Fourth Proportional to 3,572.80, 5,360 and 1,264.24

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Solution

The fourth proportional to 3,572.80, 5,360 and 1,264.24 is: 1,896.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,572.80 : 5,360 = 1,264.24 : x
  2. Step 2: Convert to fraction form
    3,572.80/5,360 = 1,264.24/x
  3. Step 3: Cross multiply
    3,572.80x = 5,360 × 1,264.24
  4. Step 4: Simplify right side
    3,572.80x = 6,776,326.40
  5. Step 5: Solve for x
    x = 6,776,326.40/3,572.80
  6. Step 6: Final answer
    x = 1,896.64

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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.