Home / 1,278.04-1,763.58-746.90

Finding the Fourth Proportional to 1,278.04, 1,763.58 and 746.90

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Solution

The fourth proportional to 1,278.04, 1,763.58 and 746.90 is: 1,030.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.04 : 1,763.58 = 746.90 : x
  2. Step 2: Convert to fraction form
    1,278.04/1,763.58 = 746.90/x
  3. Step 3: Cross multiply
    1,278.04x = 1,763.58 × 746.90
  4. Step 4: Simplify right side
    1,278.04x = 1,317,217.90
  5. Step 5: Solve for x
    x = 1,317,217.90/1,278.04
  6. Step 6: Final answer
    x = 1,030.65

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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.