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Finding the Fourth Proportional to 693.08, 1,039 and 260.16

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Solution

The fourth proportional to 693.08, 1,039 and 260.16 is: 390.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.08 : 1,039 = 260.16 : x
  2. Step 2: Convert to fraction form
    693.08/1,039 = 260.16/x
  3. Step 3: Cross multiply
    693.08x = 1,039 × 260.16
  4. Step 4: Simplify right side
    693.08x = 270,306.24
  5. Step 5: Solve for x
    x = 270,306.24/693.08
  6. Step 6: Final answer
    x = 390.01

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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.