Home / 1,321.08-1,982.10-618.92

Finding the Fourth Proportional to 1,321.08, 1,982.10 and 618.92

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Solution

The fourth proportional to 1,321.08, 1,982.10 and 618.92 is: 928.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.08 : 1,982.10 = 618.92 : x
  2. Step 2: Convert to fraction form
    1,321.08/1,982.10 = 618.92/x
  3. Step 3: Cross multiply
    1,321.08x = 1,982.10 × 618.92
  4. Step 4: Simplify right side
    1,321.08x = 1,226,751.42
  5. Step 5: Solve for x
    x = 1,226,751.42/1,321.08
  6. Step 6: Final answer
    x = 928.60

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1.5x scale

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.