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Finding the Fourth Proportional to 2,572.87, 3,858.36 and 928.99

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Solution

The fourth proportional to 2,572.87, 3,858.36 and 928.99 is: 1,393.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,572.87 : 3,858.36 = 928.99 : x
  2. Step 2: Convert to fraction form
    2,572.87/3,858.36 = 928.99/x
  3. Step 3: Cross multiply
    2,572.87x = 3,858.36 × 928.99
  4. Step 4: Simplify right side
    2,572.87x = 3,584,377.86
  5. Step 5: Solve for x
    x = 3,584,377.86/2,572.87
  6. Step 6: Final answer
    x = 1,393.14

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.