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Finding the Fourth Proportional to 642.77, 886.97 and 363.07

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Solution

The fourth proportional to 642.77, 886.97 and 363.07 is: 501.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.77 : 886.97 = 363.07 : x
  2. Step 2: Convert to fraction form
    642.77/886.97 = 363.07/x
  3. Step 3: Cross multiply
    642.77x = 886.97 × 363.07
  4. Step 4: Simplify right side
    642.77x = 322,031.29
  5. Step 5: Solve for x
    x = 322,031.29/642.77
  6. Step 6: Final answer
    x = 501.01

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Find fourth proportional to 321.38, 443.48 and 181.54
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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.