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Finding the Fourth Proportional to 719,666.42, 993,143.87 and 397,370.42

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Solution

The fourth proportional to 719,666.42, 993,143.87 and 397,370.42 is: 548,373.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,666.42 : 993,143.87 = 397,370.42 : x
  2. Step 2: Convert to fraction form
    719,666.42/993,143.87 = 397,370.42/x
  3. Step 3: Cross multiply
    719,666.42x = 993,143.87 × 397,370.42
  4. Step 4: Simplify right side
    719,666.42x = 394,645,989,789.75
  5. Step 5: Solve for x
    x = 394,645,989,789.75/719,666.42
  6. Step 6: Final answer
    x = 548,373.50

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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.