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Finding the Fourth Proportional to 391,523.68, 540,288.24 and 212,671.84

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Solution

The fourth proportional to 391,523.68, 540,288.24 and 212,671.84 is: 293,479.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,523.68 : 540,288.24 = 212,671.84 : x
  2. Step 2: Convert to fraction form
    391,523.68/540,288.24 = 212,671.84/x
  3. Step 3: Cross multiply
    391,523.68x = 540,288.24 × 212,671.84
  4. Step 4: Simplify right side
    391,523.68x = 114,904,094,131.16
  5. Step 5: Solve for x
    x = 114,904,094,131.16/391,523.68
  6. Step 6: Final answer
    x = 293,479.30

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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.