Home / 1,142.32-1,576.40-618.35

Finding the Fourth Proportional to 1,142.32, 1,576.40 and 618.35

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Solution

The fourth proportional to 1,142.32, 1,576.40 and 618.35 is: 853.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,142.32 : 1,576.40 = 618.35 : x
  2. Step 2: Convert to fraction form
    1,142.32/1,576.40 = 618.35/x
  3. Step 3: Cross multiply
    1,142.32x = 1,576.40 × 618.35
  4. Step 4: Simplify right side
    1,142.32x = 974,764.20
  5. Step 5: Solve for x
    x = 974,764.20/1,142.32
  6. Step 6: Final answer
    x = 853.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.