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Finding the Fourth Proportional to 1,639.13, 2,262.08 and 940.55

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Solution

The fourth proportional to 1,639.13, 2,262.08 and 940.55 is: 1,298.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.13 : 2,262.08 = 940.55 : x
  2. Step 2: Convert to fraction form
    1,639.13/2,262.08 = 940.55/x
  3. Step 3: Cross multiply
    1,639.13x = 2,262.08 × 940.55
  4. Step 4: Simplify right side
    1,639.13x = 2,127,590.38
  5. Step 5: Solve for x
    x = 2,127,590.38/1,639.13
  6. Step 6: Final answer
    x = 1,298.00

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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.