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Finding the Fourth Proportional to 719,635.70, 993,093 and 397,343.18

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Solution

The fourth proportional to 719,635.70, 993,093 and 397,343.18 is: 548,331.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,635.70 : 993,093 = 397,343.18 : x
  2. Step 2: Convert to fraction form
    719,635.70/993,093 = 397,343.18/x
  3. Step 3: Cross multiply
    719,635.70x = 993,093 × 397,343.18
  4. Step 4: Simplify right side
    719,635.70x = 394,598,730,655.74
  5. Step 5: Solve for x
    x = 394,598,730,655.74/719,635.70
  6. Step 6: Final answer
    x = 548,331.23

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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.