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Finding the Fourth Proportional to 398,642.53, 550,131.02 and 217,353.01

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Solution

The fourth proportional to 398,642.53, 550,131.02 and 217,353.01 is: 299,949.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,642.53 : 550,131.02 = 217,353.01 : x
  2. Step 2: Convert to fraction form
    398,642.53/550,131.02 = 217,353.01/x
  3. Step 3: Cross multiply
    398,642.53x = 550,131.02 × 217,353.01
  4. Step 4: Simplify right side
    398,642.53x = 119,572,632,004.61
  5. Step 5: Solve for x
    x = 119,572,632,004.61/398,642.53
  6. Step 6: Final answer
    x = 299,949.51

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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.