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Finding the Fourth Proportional to 699.00, 1,046.88 and 390.16

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Solution

The fourth proportional to 699.00, 1,046.88 and 390.16 is: 584.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.00 : 1,046.88 = 390.16 : x
  2. Step 2: Convert to fraction form
    699.00/1,046.88 = 390.16/x
  3. Step 3: Cross multiply
    699.00x = 1,046.88 × 390.16
  4. Step 4: Simplify right side
    699.00x = 408,452.01
  5. Step 5: Solve for x
    x = 408,452.01/699.00
  6. Step 6: Final answer
    x = 584.34

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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.