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Finding the Fourth Proportional to 716,401.48, 988,595 and 394,059.54

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Solution

The fourth proportional to 716,401.48, 988,595 and 394,059.54 is: 543,780.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,401.48 : 988,595 = 394,059.54 : x
  2. Step 2: Convert to fraction form
    716,401.48/988,595 = 394,059.54/x
  3. Step 3: Cross multiply
    716,401.48x = 988,595 × 394,059.54
  4. Step 4: Simplify right side
    716,401.48x = 389,565,290,946.30
  5. Step 5: Solve for x
    x = 389,565,290,946.30/716,401.48
  6. Step 6: Final answer
    x = 543,780.69

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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.