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Finding the Fourth Proportional to 693.65, 1,040.54 and 303.77

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Solution

The fourth proportional to 693.65, 1,040.54 and 303.77 is: 455.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.65 : 1,040.54 = 303.77 : x
  2. Step 2: Convert to fraction form
    693.65/1,040.54 = 303.77/x
  3. Step 3: Cross multiply
    693.65x = 1,040.54 × 303.77
  4. Step 4: Simplify right side
    693.65x = 316,078.11
  5. Step 5: Solve for x
    x = 316,078.11/693.65
  6. Step 6: Final answer
    x = 455.68

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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.