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Finding the Fourth Proportional to 1,965.42, 2,948.22 and 666.90

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Solution

The fourth proportional to 1,965.42, 2,948.22 and 666.90 is: 1,000.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,965.42 : 2,948.22 = 666.90 : x
  2. Step 2: Convert to fraction form
    1,965.42/2,948.22 = 666.90/x
  3. Step 3: Cross multiply
    1,965.42x = 2,948.22 × 666.90
  4. Step 4: Simplify right side
    1,965.42x = 1,966,167.92
  5. Step 5: Solve for x
    x = 1,966,167.92/1,965.42
  6. Step 6: Final answer
    x = 1,000.38

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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.