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Finding the Fourth Proportional to 716,445.50, 988,694.76 and 394,148.68

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Solution

The fourth proportional to 716,445.50, 988,694.76 and 394,148.68 is: 543,925.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,445.50 : 988,694.76 = 394,148.68 : x
  2. Step 2: Convert to fraction form
    716,445.50/988,694.76 = 394,148.68/x
  3. Step 3: Cross multiply
    716,445.50x = 988,694.76 × 394,148.68
  4. Step 4: Simplify right side
    716,445.50x = 389,692,734,576.92
  5. Step 5: Solve for x
    x = 389,692,734,576.92/716,445.50
  6. Step 6: Final answer
    x = 543,925.16

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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.