Home / 1,440.23-1,984.96-1,240.55

Finding the Fourth Proportional to 1,440.23, 1,984.96 and 1,240.55

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Solution

The fourth proportional to 1,440.23, 1,984.96 and 1,240.55 is: 1,709.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.23 : 1,984.96 = 1,240.55 : x
  2. Step 2: Convert to fraction form
    1,440.23/1,984.96 = 1,240.55/x
  3. Step 3: Cross multiply
    1,440.23x = 1,984.96 × 1,240.55
  4. Step 4: Simplify right side
    1,440.23x = 2,462,442.13
  5. Step 5: Solve for x
    x = 2,462,442.13/1,440.23
  6. Step 6: Final answer
    x = 1,709.76

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Half scale
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Double scale
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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.