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Finding the Fourth Proportional to 331,312.40, 496,968.60 and 278,824.40

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Solution

The fourth proportional to 331,312.40, 496,968.60 and 278,824.40 is: 418,236.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,312.40 : 496,968.60 = 278,824.40 : x
  2. Step 2: Convert to fraction form
    331,312.40/496,968.60 = 278,824.40/x
  3. Step 3: Cross multiply
    331,312.40x = 496,968.60 × 278,824.40
  4. Step 4: Simplify right side
    331,312.40x = 138,566,971,713.84
  5. Step 5: Solve for x
    x = 138,566,971,713.84/331,312.40
  6. Step 6: Final answer
    x = 418,236.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.