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Finding the Fourth Proportional to 713,974.80, 985,276.80 and 391,687.32

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Solution

The fourth proportional to 713,974.80, 985,276.80 and 391,687.32 is: 540,523.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,974.80 : 985,276.80 = 391,687.32 : x
  2. Step 2: Convert to fraction form
    713,974.80/985,276.80 = 391,687.32/x
  3. Step 3: Cross multiply
    713,974.80x = 985,276.80 × 391,687.32
  4. Step 4: Simplify right side
    713,974.80x = 385,920,429,250.18
  5. Step 5: Solve for x
    x = 385,920,429,250.18/713,974.80
  6. Step 6: Final answer
    x = 540,523.88

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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.