Home / 1,561.18-2,341.78-391.18

Finding the Fourth Proportional to 1,561.18, 2,341.78 and 391.18

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Solution

The fourth proportional to 1,561.18, 2,341.78 and 391.18 is: 586.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.18 : 2,341.78 = 391.18 : x
  2. Step 2: Convert to fraction form
    1,561.18/2,341.78 = 391.18/x
  3. Step 3: Cross multiply
    1,561.18x = 2,341.78 × 391.18
  4. Step 4: Simplify right side
    1,561.18x = 916,057.50
  5. Step 5: Solve for x
    x = 916,057.50/1,561.18
  6. Step 6: Final answer
    x = 586.77

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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.