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Finding the Fourth Proportional to 285,757.70, 399,535.90 and 285,757.70

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Solution

The fourth proportional to 285,757.70, 399,535.90 and 285,757.70 is: 399,535.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,757.70 : 399,535.90 = 285,757.70 : x
  2. Step 2: Convert to fraction form
    285,757.70/399,535.90 = 285,757.70/x
  3. Step 3: Cross multiply
    285,757.70x = 399,535.90 × 285,757.70
  4. Step 4: Simplify right side
    285,757.70x = 114,170,459,851.43
  5. Step 5: Solve for x
    x = 114,170,459,851.43/285,757.70
  6. Step 6: Final answer
    x = 399,535.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.