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Finding the Fourth Proportional to 1,041.32, 1,561.08 and 493.22

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Solution

The fourth proportional to 1,041.32, 1,561.08 and 493.22 is: 739.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,041.32 : 1,561.08 = 493.22 : x
  2. Step 2: Convert to fraction form
    1,041.32/1,561.08 = 493.22/x
  3. Step 3: Cross multiply
    1,041.32x = 1,561.08 × 493.22
  4. Step 4: Simplify right side
    1,041.32x = 769,955.88
  5. Step 5: Solve for x
    x = 769,955.88/1,041.32
  6. Step 6: Final answer
    x = 739.40

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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.