Home / 1,187.04-1,636.76-761.11

Finding the Fourth Proportional to 1,187.04, 1,636.76 and 761.11

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Solution

The fourth proportional to 1,187.04, 1,636.76 and 761.11 is: 1,049.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187.04 : 1,636.76 = 761.11 : x
  2. Step 2: Convert to fraction form
    1,187.04/1,636.76 = 761.11/x
  3. Step 3: Cross multiply
    1,187.04x = 1,636.76 × 761.11
  4. Step 4: Simplify right side
    1,187.04x = 1,245,752.21
  5. Step 5: Solve for x
    x = 1,245,752.21/1,187.04
  6. Step 6: Final answer
    x = 1,049.46

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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.