Home / 1,161.78-1,742.94-340.05

Finding the Fourth Proportional to 1,161.78, 1,742.94 and 340.05

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Solution

The fourth proportional to 1,161.78, 1,742.94 and 340.05 is: 510.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.78 : 1,742.94 = 340.05 : x
  2. Step 2: Convert to fraction form
    1,161.78/1,742.94 = 340.05/x
  3. Step 3: Cross multiply
    1,161.78x = 1,742.94 × 340.05
  4. Step 4: Simplify right side
    1,161.78x = 592,686.75
  5. Step 5: Solve for x
    x = 592,686.75/1,161.78
  6. Step 6: Final answer
    x = 510.15

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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.