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Finding the Fourth Proportional to 1,342.98, 1,853.40 and 753.56

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Solution

The fourth proportional to 1,342.98, 1,853.40 and 753.56 is: 1,039.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,342.98 : 1,853.40 = 753.56 : x
  2. Step 2: Convert to fraction form
    1,342.98/1,853.40 = 753.56/x
  3. Step 3: Cross multiply
    1,342.98x = 1,853.40 × 753.56
  4. Step 4: Simplify right side
    1,342.98x = 1,396,638.84
  5. Step 5: Solve for x
    x = 1,396,638.84/1,342.98
  6. Step 6: Final answer
    x = 1,039.96

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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.