Home / 1,255.20-1,881.43-561.13

Finding the Fourth Proportional to 1,255.20, 1,881.43 and 561.13

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Solution

The fourth proportional to 1,255.20, 1,881.43 and 561.13 is: 841.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.20 : 1,881.43 = 561.13 : x
  2. Step 2: Convert to fraction form
    1,255.20/1,881.43 = 561.13/x
  3. Step 3: Cross multiply
    1,255.20x = 1,881.43 × 561.13
  4. Step 4: Simplify right side
    1,255.20x = 1,055,720.71
  5. Step 5: Solve for x
    x = 1,055,720.71/1,255.20
  6. Step 6: Final answer
    x = 841.08

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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.