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Finding the Fourth Proportional to 719,840.84, 993,387.86 and 397,559.12

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Solution

The fourth proportional to 719,840.84, 993,387.86 and 397,559.12 is: 548,635.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,840.84 : 993,387.86 = 397,559.12 : x
  2. Step 2: Convert to fraction form
    719,840.84/993,387.86 = 397,559.12/x
  3. Step 3: Cross multiply
    719,840.84x = 993,387.86 × 397,559.12
  4. Step 4: Simplify right side
    719,840.84x = 394,930,403,440.28
  5. Step 5: Solve for x
    x = 394,930,403,440.28/719,840.84
  6. Step 6: Final answer
    x = 548,635.73

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Double scale
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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.