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Finding the Fourth Proportional to 444.76, 669.73 and 391.30

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Solution

The fourth proportional to 444.76, 669.73 and 391.30 is: 589.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.76 : 669.73 = 391.30 : x
  2. Step 2: Convert to fraction form
    444.76/669.73 = 391.30/x
  3. Step 3: Cross multiply
    444.76x = 669.73 × 391.30
  4. Step 4: Simplify right side
    444.76x = 262,065.35
  5. Step 5: Solve for x
    x = 262,065.35/444.76
  6. Step 6: Final answer
    x = 589.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.