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Finding the Fourth Proportional to 675.86, 931.80 and 465.65

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Solution

The fourth proportional to 675.86, 931.80 and 465.65 is: 641.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.86 : 931.80 = 465.65 : x
  2. Step 2: Convert to fraction form
    675.86/931.80 = 465.65/x
  3. Step 3: Cross multiply
    675.86x = 931.80 × 465.65
  4. Step 4: Simplify right side
    675.86x = 433,892.67
  5. Step 5: Solve for x
    x = 433,892.67/675.86
  6. Step 6: Final answer
    x = 641.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.