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Finding the Fourth Proportional to 675.05, 931.08 and 465.30

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Solution

The fourth proportional to 675.05, 931.08 and 465.30 is: 641.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.05 : 931.08 = 465.30 : x
  2. Step 2: Convert to fraction form
    675.05/931.08 = 465.30/x
  3. Step 3: Cross multiply
    675.05x = 931.08 × 465.30
  4. Step 4: Simplify right side
    675.05x = 433,231.52
  5. Step 5: Solve for x
    x = 433,231.52/675.05
  6. Step 6: Final answer
    x = 641.78

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1.5x scale

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.