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Finding the Fourth Proportional to 1,173.42, 1,620.68 and 753.71

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Solution

The fourth proportional to 1,173.42, 1,620.68 and 753.71 is: 1,040.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.42 : 1,620.68 = 753.71 : x
  2. Step 2: Convert to fraction form
    1,173.42/1,620.68 = 753.71/x
  3. Step 3: Cross multiply
    1,173.42x = 1,620.68 × 753.71
  4. Step 4: Simplify right side
    1,173.42x = 1,221,510.85
  5. Step 5: Solve for x
    x = 1,221,510.85/1,173.42
  6. Step 6: Final answer
    x = 1,040.98

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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.