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Finding the Fourth Proportional to 3,543.72, 5,315.84 and 1,695.64

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Solution

The fourth proportional to 3,543.72, 5,315.84 and 1,695.64 is: 2,543.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,543.72 : 5,315.84 = 1,695.64 : x
  2. Step 2: Convert to fraction form
    3,543.72/5,315.84 = 1,695.64/x
  3. Step 3: Cross multiply
    3,543.72x = 5,315.84 × 1,695.64
  4. Step 4: Simplify right side
    3,543.72x = 9,013,750.94
  5. Step 5: Solve for x
    x = 9,013,750.94/3,543.72
  6. Step 6: Final answer
    x = 2,543.58

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1.5x scale

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.