Home / 1,177.20-1,624.47-646.06

Finding the Fourth Proportional to 1,177.20, 1,624.47 and 646.06

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Solution

The fourth proportional to 1,177.20, 1,624.47 and 646.06 is: 891.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,177.20 : 1,624.47 = 646.06 : x
  2. Step 2: Convert to fraction form
    1,177.20/1,624.47 = 646.06/x
  3. Step 3: Cross multiply
    1,177.20x = 1,624.47 × 646.06
  4. Step 4: Simplify right side
    1,177.20x = 1,049,497.80
  5. Step 5: Solve for x
    x = 1,049,497.80/1,177.20
  6. Step 6: Final answer
    x = 891.52

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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.