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Finding the Fourth Proportional to 1,507.78, 2,077.14 and 1,240.48

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Solution

The fourth proportional to 1,507.78, 2,077.14 and 1,240.48 is: 1,708.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,507.78 : 2,077.14 = 1,240.48 : x
  2. Step 2: Convert to fraction form
    1,507.78/2,077.14 = 1,240.48/x
  3. Step 3: Cross multiply
    1,507.78x = 2,077.14 × 1,240.48
  4. Step 4: Simplify right side
    1,507.78x = 2,576,650.63
  5. Step 5: Solve for x
    x = 2,576,650.63/1,507.78
  6. Step 6: Final answer
    x = 1,708.90

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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.