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Finding the Fourth Proportional to 907.46, 1,253.44 and 671.75

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Solution

The fourth proportional to 907.46, 1,253.44 and 671.75 is: 927.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.46 : 1,253.44 = 671.75 : x
  2. Step 2: Convert to fraction form
    907.46/1,253.44 = 671.75/x
  3. Step 3: Cross multiply
    907.46x = 1,253.44 × 671.75
  4. Step 4: Simplify right side
    907.46x = 841,998.32
  5. Step 5: Solve for x
    x = 841,998.32/907.46
  6. Step 6: Final answer
    x = 927.86

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1.5x scale

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.