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Finding the Fourth Proportional to 718,446.65, 991,433.75 and 396,170.33

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Solution

The fourth proportional to 718,446.65, 991,433.75 and 396,170.33 is: 546,702.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,446.65 : 991,433.75 = 396,170.33 : x
  2. Step 2: Convert to fraction form
    718,446.65/991,433.75 = 396,170.33/x
  3. Step 3: Cross multiply
    718,446.65x = 991,433.75 × 396,170.33
  4. Step 4: Simplify right side
    718,446.65x = 392,776,636,408.37
  5. Step 5: Solve for x
    x = 392,776,636,408.37/718,446.65
  6. Step 6: Final answer
    x = 546,702.58

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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.