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Finding the Fourth Proportional to 1,041.36, 1,561.90 and 493.89

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Solution

The fourth proportional to 1,041.36, 1,561.90 and 493.89 is: 740.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,041.36 : 1,561.90 = 493.89 : x
  2. Step 2: Convert to fraction form
    1,041.36/1,561.90 = 493.89/x
  3. Step 3: Cross multiply
    1,041.36x = 1,561.90 × 493.89
  4. Step 4: Simplify right side
    1,041.36x = 771,397.75
  5. Step 5: Solve for x
    x = 771,397.75/1,041.36
  6. Step 6: Final answer
    x = 740.76

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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.