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Finding the Fourth Proportional to 642.07, 886.23 and 380.17

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Solution

The fourth proportional to 642.07, 886.23 and 380.17 is: 524.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.07 : 886.23 = 380.17 : x
  2. Step 2: Convert to fraction form
    642.07/886.23 = 380.17/x
  3. Step 3: Cross multiply
    642.07x = 886.23 × 380.17
  4. Step 4: Simplify right side
    642.07x = 336,918.06
  5. Step 5: Solve for x
    x = 336,918.06/642.07
  6. Step 6: Final answer
    x = 524.74

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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.