Home / 391,845.64-540,806.08-238,972.56

Finding the Fourth Proportional to 391,845.64, 540,806.08 and 238,972.56

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Solution

The fourth proportional to 391,845.64, 540,806.08 and 238,972.56 is: 329,818.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,845.64 : 540,806.08 = 238,972.56 : x
  2. Step 2: Convert to fraction form
    391,845.64/540,806.08 = 238,972.56/x
  3. Step 3: Cross multiply
    391,845.64x = 540,806.08 × 238,972.56
  4. Step 4: Simplify right side
    391,845.64x = 129,237,813,401.17
  5. Step 5: Solve for x
    x = 129,237,813,401.17/391,845.64
  6. Step 6: Final answer
    x = 329,818.17

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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.