Home / 1,312.32-1,963.56-1,190.76

Finding the Fourth Proportional to 1,312.32, 1,963.56 and 1,190.76

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Solution

The fourth proportional to 1,312.32, 1,963.56 and 1,190.76 is: 1,781.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.32 : 1,963.56 = 1,190.76 : x
  2. Step 2: Convert to fraction form
    1,312.32/1,963.56 = 1,190.76/x
  3. Step 3: Cross multiply
    1,312.32x = 1,963.56 × 1,190.76
  4. Step 4: Simplify right side
    1,312.32x = 2,338,128.71
  5. Step 5: Solve for x
    x = 2,338,128.71/1,312.32
  6. Step 6: Final answer
    x = 1,781.68

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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.