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Finding the Fourth Proportional to 1,156.20, 1,734.84 and 579

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Solution

The fourth proportional to 1,156.20, 1,734.84 and 579 is: 868.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,156.20 : 1,734.84 = 579 : x
  2. Step 2: Convert to fraction form
    1,156.20/1,734.84 = 579/x
  3. Step 3: Cross multiply
    1,156.20x = 1,734.84 × 579
  4. Step 4: Simplify right side
    1,156.20x = 1,004,472.36
  5. Step 5: Solve for x
    x = 1,004,472.36/1,156.20
  6. Step 6: Final answer
    x = 868.77

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.