Home / 1,439.30-2,160.16-746.39

Finding the Fourth Proportional to 1,439.30, 2,160.16 and 746.39

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Solution

The fourth proportional to 1,439.30, 2,160.16 and 746.39 is: 1,120.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.30 : 2,160.16 = 746.39 : x
  2. Step 2: Convert to fraction form
    1,439.30/2,160.16 = 746.39/x
  3. Step 3: Cross multiply
    1,439.30x = 2,160.16 × 746.39
  4. Step 4: Simplify right side
    1,439.30x = 1,612,307.29
  5. Step 5: Solve for x
    x = 1,612,307.29/1,439.30
  6. Step 6: Final answer
    x = 1,120.21

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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.