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Finding the Fourth Proportional to 679.16, 941.27 and 647.48

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Solution

The fourth proportional to 679.16, 941.27 and 647.48 is: 897.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.16 : 941.27 = 647.48 : x
  2. Step 2: Convert to fraction form
    679.16/941.27 = 647.48/x
  3. Step 3: Cross multiply
    679.16x = 941.27 × 647.48
  4. Step 4: Simplify right side
    679.16x = 609,453.50
  5. Step 5: Solve for x
    x = 609,453.50/679.16
  6. Step 6: Final answer
    x = 897.36

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.