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Finding the Fourth Proportional to 391,256.32, 539,925.60 and 212,408.32

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Solution

The fourth proportional to 391,256.32, 539,925.60 and 212,408.32 is: 293,119.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,256.32 : 539,925.60 = 212,408.32 : x
  2. Step 2: Convert to fraction form
    391,256.32/539,925.60 = 212,408.32/x
  3. Step 3: Cross multiply
    391,256.32x = 539,925.60 × 212,408.32
  4. Step 4: Simplify right side
    391,256.32x = 114,684,689,620.99
  5. Step 5: Solve for x
    x = 114,684,689,620.99/391,256.32
  6. Step 6: Final answer
    x = 293,119.07

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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.