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Finding the Fourth Proportional to 647.37, 975.94 and 605.61

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Solution

The fourth proportional to 647.37, 975.94 and 605.61 is: 912.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.37 : 975.94 = 605.61 : x
  2. Step 2: Convert to fraction form
    647.37/975.94 = 605.61/x
  3. Step 3: Cross multiply
    647.37x = 975.94 × 605.61
  4. Step 4: Simplify right side
    647.37x = 591,036.00
  5. Step 5: Solve for x
    x = 591,036.00/647.37
  6. Step 6: Final answer
    x = 912.98

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.