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Finding the Fourth Proportional to 1,330.08, 2,005.08 and 1,240.87

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Solution

The fourth proportional to 1,330.08, 2,005.08 and 1,240.87 is: 1,870.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.08 : 2,005.08 = 1,240.87 : x
  2. Step 2: Convert to fraction form
    1,330.08/2,005.08 = 1,240.87/x
  3. Step 3: Cross multiply
    1,330.08x = 2,005.08 × 1,240.87
  4. Step 4: Simplify right side
    1,330.08x = 2,488,043.62
  5. Step 5: Solve for x
    x = 2,488,043.62/1,330.08
  6. Step 6: Final answer
    x = 1,870.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.