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Finding the Fourth Proportional to 1,145.42, 1,718.31 and 496.60

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Solution

The fourth proportional to 1,145.42, 1,718.31 and 496.60 is: 744.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.42 : 1,718.31 = 496.60 : x
  2. Step 2: Convert to fraction form
    1,145.42/1,718.31 = 496.60/x
  3. Step 3: Cross multiply
    1,145.42x = 1,718.31 × 496.60
  4. Step 4: Simplify right side
    1,145.42x = 853,312.75
  5. Step 5: Solve for x
    x = 853,312.75/1,145.42
  6. Step 6: Final answer
    x = 744.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.