Home / 1,292.20-1,938.63-561.91

Finding the Fourth Proportional to 1,292.20, 1,938.63 and 561.91

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Solution

The fourth proportional to 1,292.20, 1,938.63 and 561.91 is: 843.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.20 : 1,938.63 = 561.91 : x
  2. Step 2: Convert to fraction form
    1,292.20/1,938.63 = 561.91/x
  3. Step 3: Cross multiply
    1,292.20x = 1,938.63 × 561.91
  4. Step 4: Simplify right side
    1,292.20x = 1,089,335.58
  5. Step 5: Solve for x
    x = 1,089,335.58/1,292.20
  6. Step 6: Final answer
    x = 843.01

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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.