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Finding the Fourth Proportional to 647.67, 891.53 and 564.63

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Solution

The fourth proportional to 647.67, 891.53 and 564.63 is: 777.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.67 : 891.53 = 564.63 : x
  2. Step 2: Convert to fraction form
    647.67/891.53 = 564.63/x
  3. Step 3: Cross multiply
    647.67x = 891.53 × 564.63
  4. Step 4: Simplify right side
    647.67x = 503,385.10
  5. Step 5: Solve for x
    x = 503,385.10/647.67
  6. Step 6: Final answer
    x = 777.22

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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.