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Finding the Fourth Proportional to 2,565.12, 3,846.99 and 715.91

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Solution

The fourth proportional to 2,565.12, 3,846.99 and 715.91 is: 1,073.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,565.12 : 3,846.99 = 715.91 : x
  2. Step 2: Convert to fraction form
    2,565.12/3,846.99 = 715.91/x
  3. Step 3: Cross multiply
    2,565.12x = 3,846.99 × 715.91
  4. Step 4: Simplify right side
    2,565.12x = 2,754,077.59
  5. Step 5: Solve for x
    x = 2,754,077.59/2,565.12
  6. Step 6: Final answer
    x = 1,073.67

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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.