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Finding the Fourth Proportional to 1,208.17, 1,666.68 and 760.58

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Solution

The fourth proportional to 1,208.17, 1,666.68 and 760.58 is: 1,049.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.17 : 1,666.68 = 760.58 : x
  2. Step 2: Convert to fraction form
    1,208.17/1,666.68 = 760.58/x
  3. Step 3: Cross multiply
    1,208.17x = 1,666.68 × 760.58
  4. Step 4: Simplify right side
    1,208.17x = 1,267,632.29
  5. Step 5: Solve for x
    x = 1,267,632.29/1,208.17
  6. Step 6: Final answer
    x = 1,049.22

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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.