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Finding the Fourth Proportional to 1,563.25, 2,157.42 and 864.76

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Solution

The fourth proportional to 1,563.25, 2,157.42 and 864.76 is: 1,193.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.25 : 2,157.42 = 864.76 : x
  2. Step 2: Convert to fraction form
    1,563.25/2,157.42 = 864.76/x
  3. Step 3: Cross multiply
    1,563.25x = 2,157.42 × 864.76
  4. Step 4: Simplify right side
    1,563.25x = 1,865,650.52
  5. Step 5: Solve for x
    x = 1,865,650.52/1,563.25
  6. Step 6: Final answer
    x = 1,193.44

Related Problems

Find fourth proportional to 781.63, 1,078.71 and 432.38
Half scale
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Double scale
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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.