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Finding the Fourth Proportional to 1,040.34, 1,560.11 and 346.87

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Solution

The fourth proportional to 1,040.34, 1,560.11 and 346.87 is: 520.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.34 : 1,560.11 = 346.87 : x
  2. Step 2: Convert to fraction form
    1,040.34/1,560.11 = 346.87/x
  3. Step 3: Cross multiply
    1,040.34x = 1,560.11 × 346.87
  4. Step 4: Simplify right side
    1,040.34x = 541,153.62
  5. Step 5: Solve for x
    x = 541,153.62/1,040.34
  6. Step 6: Final answer
    x = 520.17

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Double scale
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1.5x scale

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.