Home / 1,210.91-1,671.60-931.04

Finding the Fourth Proportional to 1,210.91, 1,671.60 and 931.04

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Solution

The fourth proportional to 1,210.91, 1,671.60 and 931.04 is: 1,285.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.91 : 1,671.60 = 931.04 : x
  2. Step 2: Convert to fraction form
    1,210.91/1,671.60 = 931.04/x
  3. Step 3: Cross multiply
    1,210.91x = 1,671.60 × 931.04
  4. Step 4: Simplify right side
    1,210.91x = 1,556,326.46
  5. Step 5: Solve for x
    x = 1,556,326.46/1,210.91
  6. Step 6: Final answer
    x = 1,285.26

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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.