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Finding the Fourth Proportional to 716,339.72, 988,551.15 and 394,074.34

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Solution

The fourth proportional to 716,339.72, 988,551.15 and 394,074.34 is: 543,823.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,339.72 : 988,551.15 = 394,074.34 : x
  2. Step 2: Convert to fraction form
    716,339.72/988,551.15 = 394,074.34/x
  3. Step 3: Cross multiply
    716,339.72x = 988,551.15 × 394,074.34
  4. Step 4: Simplify right side
    716,339.72x = 389,562,641,992.49
  5. Step 5: Solve for x
    x = 389,562,641,992.49/716,339.72
  6. Step 6: Final answer
    x = 543,823.87

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Double scale
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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.