Home / 1,439.02-2,158.35-745.30

Finding the Fourth Proportional to 1,439.02, 2,158.35 and 745.30

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Solution

The fourth proportional to 1,439.02, 2,158.35 and 745.30 is: 1,117.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.02 : 2,158.35 = 745.30 : x
  2. Step 2: Convert to fraction form
    1,439.02/2,158.35 = 745.30/x
  3. Step 3: Cross multiply
    1,439.02x = 2,158.35 × 745.30
  4. Step 4: Simplify right side
    1,439.02x = 1,608,618.26
  5. Step 5: Solve for x
    x = 1,608,618.26/1,439.02
  6. Step 6: Final answer
    x = 1,117.86

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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.