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Finding the Fourth Proportional to 643.47, 887.00 and 410.19

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Solution

The fourth proportional to 643.47, 887.00 and 410.19 is: 565.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.47 : 887.00 = 410.19 : x
  2. Step 2: Convert to fraction form
    643.47/887.00 = 410.19/x
  3. Step 3: Cross multiply
    643.47x = 887.00 × 410.19
  4. Step 4: Simplify right side
    643.47x = 363,836.48
  5. Step 5: Solve for x
    x = 363,836.48/643.47
  6. Step 6: Final answer
    x = 565.43

Related Problems

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Double scale
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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.