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Finding the Fourth Proportional to 398,891.94, 550,421.46 and 243,921.12

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Solution

The fourth proportional to 398,891.94, 550,421.46 and 243,921.12 is: 336,580.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,891.94 : 550,421.46 = 243,921.12 : x
  2. Step 2: Convert to fraction form
    398,891.94/550,421.46 = 243,921.12/x
  3. Step 3: Cross multiply
    398,891.94x = 550,421.46 × 243,921.12
  4. Step 4: Simplify right side
    398,891.94x = 134,259,418,995.24
  5. Step 5: Solve for x
    x = 134,259,418,995.24/398,891.94
  6. Step 6: Final answer
    x = 336,580.93

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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.