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Finding the Fourth Proportional to 568,510.12, 784,539.90 and 310,387.05

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Solution

The fourth proportional to 568,510.12, 784,539.90 and 310,387.05 is: 428,331.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    568,510.12 : 784,539.90 = 310,387.05 : x
  2. Step 2: Convert to fraction form
    568,510.12/784,539.90 = 310,387.05/x
  3. Step 3: Cross multiply
    568,510.12x = 784,539.90 × 310,387.05
  4. Step 4: Simplify right side
    568,510.12x = 243,511,025,168.30
  5. Step 5: Solve for x
    x = 243,511,025,168.30/568,510.12
  6. Step 6: Final answer
    x = 428,331.91

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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.