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Finding the Fourth Proportional to 2,391.67, 3,574.67 and 2,156.87

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Solution

The fourth proportional to 2,391.67, 3,574.67 and 2,156.87 is: 3,223.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,391.67 : 3,574.67 = 2,156.87 : x
  2. Step 2: Convert to fraction form
    2,391.67/3,574.67 = 2,156.87/x
  3. Step 3: Cross multiply
    2,391.67x = 3,574.67 × 2,156.87
  4. Step 4: Simplify right side
    2,391.67x = 7,710,080.61
  5. Step 5: Solve for x
    x = 7,710,080.61/2,391.67
  6. Step 6: Final answer
    x = 3,223.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.