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Finding the Fourth Proportional to 1,177.43, 1,624.84 and 646.31

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Solution

The fourth proportional to 1,177.43, 1,624.84 and 646.31 is: 891.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,177.43 : 1,624.84 = 646.31 : x
  2. Step 2: Convert to fraction form
    1,177.43/1,624.84 = 646.31/x
  3. Step 3: Cross multiply
    1,177.43x = 1,624.84 × 646.31
  4. Step 4: Simplify right side
    1,177.43x = 1,050,152.79
  5. Step 5: Solve for x
    x = 1,050,152.79/1,177.43
  6. Step 6: Final answer
    x = 891.91

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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.