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Finding the Fourth Proportional to 2,931.65, 4,046.07 and 1,672.42

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Solution

The fourth proportional to 2,931.65, 4,046.07 and 1,672.42 is: 2,308.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.65 : 4,046.07 = 1,672.42 : x
  2. Step 2: Convert to fraction form
    2,931.65/4,046.07 = 1,672.42/x
  3. Step 3: Cross multiply
    2,931.65x = 4,046.07 × 1,672.42
  4. Step 4: Simplify right side
    2,931.65x = 6,766,717.06
  5. Step 5: Solve for x
    x = 6,766,717.06/2,931.65
  6. Step 6: Final answer
    x = 2,308.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.