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Finding the Fourth Proportional to 438,713.12, 605,419.44 and 247,715.20

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Solution

The fourth proportional to 438,713.12, 605,419.44 and 247,715.20 is: 341,844.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,713.12 : 605,419.44 = 247,715.20 : x
  2. Step 2: Convert to fraction form
    438,713.12/605,419.44 = 247,715.20/x
  3. Step 3: Cross multiply
    438,713.12x = 605,419.44 × 247,715.20
  4. Step 4: Simplify right side
    438,713.12x = 149,971,597,663.49
  5. Step 5: Solve for x
    x = 149,971,597,663.49/438,713.12
  6. Step 6: Final answer
    x = 341,844.34

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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.