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Finding the Fourth Proportional to 713,490.12, 984,608.87 and 391,199.42

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Solution

The fourth proportional to 713,490.12, 984,608.87 and 391,199.42 is: 539,851.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,490.12 : 984,608.87 = 391,199.42 : x
  2. Step 2: Convert to fraction form
    713,490.12/984,608.87 = 391,199.42/x
  3. Step 3: Cross multiply
    713,490.12x = 984,608.87 × 391,199.42
  4. Step 4: Simplify right side
    713,490.12x = 385,178,419,376.38
  5. Step 5: Solve for x
    x = 385,178,419,376.38/713,490.12
  6. Step 6: Final answer
    x = 539,851.09

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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.