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Finding the Fourth Proportional to 391,114.84, 539,738.70 and 212,266.84

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Solution

The fourth proportional to 391,114.84, 539,738.70 and 212,266.84 is: 292,928.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,114.84 : 539,738.70 = 212,266.84 : x
  2. Step 2: Convert to fraction form
    391,114.84/539,738.70 = 212,266.84/x
  3. Step 3: Cross multiply
    391,114.84x = 539,738.70 × 212,266.84
  4. Step 4: Simplify right side
    391,114.84x = 114,568,628,274.71
  5. Step 5: Solve for x
    x = 114,568,628,274.71/391,114.84
  6. Step 6: Final answer
    x = 292,928.36

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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.