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Finding the Fourth Proportional to 3,666.70, 5,490.33 and 1,931.68

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Solution

The fourth proportional to 3,666.70, 5,490.33 and 1,931.68 is: 2,892.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,666.70 : 5,490.33 = 1,931.68 : x
  2. Step 2: Convert to fraction form
    3,666.70/5,490.33 = 1,931.68/x
  3. Step 3: Cross multiply
    3,666.70x = 5,490.33 × 1,931.68
  4. Step 4: Simplify right side
    3,666.70x = 10,605,560.65
  5. Step 5: Solve for x
    x = 10,605,560.65/3,666.70
  6. Step 6: Final answer
    x = 2,892.40

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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.