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Finding the Fourth Proportional to 1,149.68, 1,586.58 and 684.20

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Solution

The fourth proportional to 1,149.68, 1,586.58 and 684.20 is: 944.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149.68 : 1,586.58 = 684.20 : x
  2. Step 2: Convert to fraction form
    1,149.68/1,586.58 = 684.20/x
  3. Step 3: Cross multiply
    1,149.68x = 1,586.58 × 684.20
  4. Step 4: Simplify right side
    1,149.68x = 1,085,538.04
  5. Step 5: Solve for x
    x = 1,085,538.04/1,149.68
  6. Step 6: Final answer
    x = 944.21

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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.