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Finding the Fourth Proportional to 398,796.58, 550,337.16 and 217,505.26

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Solution

The fourth proportional to 398,796.58, 550,337.16 and 217,505.26 is: 300,156.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,796.58 : 550,337.16 = 217,505.26 : x
  2. Step 2: Convert to fraction form
    398,796.58/550,337.16 = 217,505.26/x
  3. Step 3: Cross multiply
    398,796.58x = 550,337.16 × 217,505.26
  4. Step 4: Simplify right side
    398,796.58x = 119,701,227,073.46
  5. Step 5: Solve for x
    x = 119,701,227,073.46/398,796.58
  6. Step 6: Final answer
    x = 300,156.10

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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.