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Finding the Fourth Proportional to 686.50, 947.37 and 410.50

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Solution

The fourth proportional to 686.50, 947.37 and 410.50 is: 566.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    686.50 : 947.37 = 410.50 : x
  2. Step 2: Convert to fraction form
    686.50/947.37 = 410.50/x
  3. Step 3: Cross multiply
    686.50x = 947.37 × 410.50
  4. Step 4: Simplify right side
    686.50x = 388,895.39
  5. Step 5: Solve for x
    x = 388,895.39/686.50
  6. Step 6: Final answer
    x = 566.49

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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.