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Finding the Fourth Proportional to 628.95, 867.45 and 380.01

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Solution

The fourth proportional to 628.95, 867.45 and 380.01 is: 524.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.95 : 867.45 = 380.01 : x
  2. Step 2: Convert to fraction form
    628.95/867.45 = 380.01/x
  3. Step 3: Cross multiply
    628.95x = 867.45 × 380.01
  4. Step 4: Simplify right side
    628.95x = 329,639.67
  5. Step 5: Solve for x
    x = 329,639.67/628.95
  6. Step 6: Final answer
    x = 524.11

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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.