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Finding the Fourth Proportional to 1,041.36, 1,561.69 and 347.84

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Solution

The fourth proportional to 1,041.36, 1,561.69 and 347.84 is: 521.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,041.36 : 1,561.69 = 347.84 : x
  2. Step 2: Convert to fraction form
    1,041.36/1,561.69 = 347.84/x
  3. Step 3: Cross multiply
    1,041.36x = 1,561.69 × 347.84
  4. Step 4: Simplify right side
    1,041.36x = 543,208.70
  5. Step 5: Solve for x
    x = 543,208.70/1,041.36
  6. Step 6: Final answer
    x = 521.63

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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.