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Finding the Fourth Proportional to 699.16, 1,048.45 and 260.44

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Solution

The fourth proportional to 699.16, 1,048.45 and 260.44 is: 390.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.16 : 1,048.45 = 260.44 : x
  2. Step 2: Convert to fraction form
    699.16/1,048.45 = 260.44/x
  3. Step 3: Cross multiply
    699.16x = 1,048.45 × 260.44
  4. Step 4: Simplify right side
    699.16x = 273,058.32
  5. Step 5: Solve for x
    x = 273,058.32/699.16
  6. Step 6: Final answer
    x = 390.55

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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.