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Finding the Fourth Proportional to 698.87, 1,048.61 and 265.92

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Solution

The fourth proportional to 698.87, 1,048.61 and 265.92 is: 399.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.87 : 1,048.61 = 265.92 : x
  2. Step 2: Convert to fraction form
    698.87/1,048.61 = 265.92/x
  3. Step 3: Cross multiply
    698.87x = 1,048.61 × 265.92
  4. Step 4: Simplify right side
    698.87x = 278,846.37
  5. Step 5: Solve for x
    x = 278,846.37/698.87
  6. Step 6: Final answer
    x = 399.00

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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.