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Finding the Fourth Proportional to 1,695.70, 2,543.75 and 655.66

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Solution

The fourth proportional to 1,695.70, 2,543.75 and 655.66 is: 983.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,695.70 : 2,543.75 = 655.66 : x
  2. Step 2: Convert to fraction form
    1,695.70/2,543.75 = 655.66/x
  3. Step 3: Cross multiply
    1,695.70x = 2,543.75 × 655.66
  4. Step 4: Simplify right side
    1,695.70x = 1,667,830.40
  5. Step 5: Solve for x
    x = 1,667,830.40/1,695.70
  6. Step 6: Final answer
    x = 983.57

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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.