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Finding the Fourth Proportional to 438,715.12, 605,422.20 and 247,717.20

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Solution

The fourth proportional to 438,715.12, 605,422.20 and 247,717.20 is: 341,847.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,715.12 : 605,422.20 = 247,717.20 : x
  2. Step 2: Convert to fraction form
    438,715.12/605,422.20 = 247,717.20/x
  3. Step 3: Cross multiply
    438,715.12x = 605,422.20 × 247,717.20
  4. Step 4: Simplify right side
    438,715.12x = 149,973,492,201.84
  5. Step 5: Solve for x
    x = 149,973,492,201.84/438,715.12
  6. Step 6: Final answer
    x = 341,847.10

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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.