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Finding the Fourth Proportional to 2,931.07, 4,398.41 and 2,657.65

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Solution

The fourth proportional to 2,931.07, 4,398.41 and 2,657.65 is: 3,988.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.07 : 4,398.41 = 2,657.65 : x
  2. Step 2: Convert to fraction form
    2,931.07/4,398.41 = 2,657.65/x
  3. Step 3: Cross multiply
    2,931.07x = 4,398.41 × 2,657.65
  4. Step 4: Simplify right side
    2,931.07x = 11,689,434.34
  5. Step 5: Solve for x
    x = 11,689,434.34/2,931.07
  6. Step 6: Final answer
    x = 3,988.11

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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.