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Finding the Fourth Proportional to 699.87, 1,048.92 and 613.00

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Solution

The fourth proportional to 699.87, 1,048.92 and 613.00 is: 918.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.87 : 1,048.92 = 613.00 : x
  2. Step 2: Convert to fraction form
    699.87/1,048.92 = 613.00/x
  3. Step 3: Cross multiply
    699.87x = 1,048.92 × 613.00
  4. Step 4: Simplify right side
    699.87x = 642,982.72
  5. Step 5: Solve for x
    x = 642,982.72/699.87
  6. Step 6: Final answer
    x = 918.72

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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.