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Finding the Fourth Proportional to 907.66, 1,250.76 and 645.22

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Solution

The fourth proportional to 907.66, 1,250.76 and 645.22 is: 889.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.66 : 1,250.76 = 645.22 : x
  2. Step 2: Convert to fraction form
    907.66/1,250.76 = 645.22/x
  3. Step 3: Cross multiply
    907.66x = 1,250.76 × 645.22
  4. Step 4: Simplify right side
    907.66x = 807,015.37
  5. Step 5: Solve for x
    x = 807,015.37/907.66
  6. Step 6: Final answer
    x = 889.12

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.