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Finding the Fourth Proportional to 1,887.55, 2,605.29 and 1,259.12

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Solution

The fourth proportional to 1,887.55, 2,605.29 and 1,259.12 is: 1,737.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,887.55 : 2,605.29 = 1,259.12 : x
  2. Step 2: Convert to fraction form
    1,887.55/2,605.29 = 1,259.12/x
  3. Step 3: Cross multiply
    1,887.55x = 2,605.29 × 1,259.12
  4. Step 4: Simplify right side
    1,887.55x = 3,280,372.74
  5. Step 5: Solve for x
    x = 3,280,372.74/1,887.55
  6. Step 6: Final answer
    x = 1,737.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.