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Finding the Fourth Proportional to 2,572.86, 3,859.28 and 929.40

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Solution

The fourth proportional to 2,572.86, 3,859.28 and 929.40 is: 1,394.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,572.86 : 3,859.28 = 929.40 : x
  2. Step 2: Convert to fraction form
    2,572.86/3,859.28 = 929.40/x
  3. Step 3: Cross multiply
    2,572.86x = 3,859.28 × 929.40
  4. Step 4: Simplify right side
    2,572.86x = 3,586,795.54
  5. Step 5: Solve for x
    x = 3,586,795.54/2,572.86
  6. Step 6: Final answer
    x = 1,394.09

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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.