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Finding the Fourth Proportional to 1,531.99, 2,114.19 and 868.95

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Solution

The fourth proportional to 1,531.99, 2,114.19 and 868.95 is: 1,199.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.99 : 2,114.19 = 868.95 : x
  2. Step 2: Convert to fraction form
    1,531.99/2,114.19 = 868.95/x
  3. Step 3: Cross multiply
    1,531.99x = 2,114.19 × 868.95
  4. Step 4: Simplify right side
    1,531.99x = 1,837,125.40
  5. Step 5: Solve for x
    x = 1,837,125.40/1,531.99
  6. Step 6: Final answer
    x = 1,199.18

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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.