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Finding the Fourth Proportional to 674.99, 931.46 and 380.28

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Solution

The fourth proportional to 674.99, 931.46 and 380.28 is: 524.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.99 : 931.46 = 380.28 : x
  2. Step 2: Convert to fraction form
    674.99/931.46 = 380.28/x
  3. Step 3: Cross multiply
    674.99x = 931.46 × 380.28
  4. Step 4: Simplify right side
    674.99x = 354,213.71
  5. Step 5: Solve for x
    x = 354,213.71/674.99
  6. Step 6: Final answer
    x = 524.77

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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.