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Finding the Fourth Proportional to 907.35, 1,251.46 and 628.05

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Solution

The fourth proportional to 907.35, 1,251.46 and 628.05 is: 866.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.35 : 1,251.46 = 628.05 : x
  2. Step 2: Convert to fraction form
    907.35/1,251.46 = 628.05/x
  3. Step 3: Cross multiply
    907.35x = 1,251.46 × 628.05
  4. Step 4: Simplify right side
    907.35x = 785,983.16
  5. Step 5: Solve for x
    x = 785,983.16/907.35
  6. Step 6: Final answer
    x = 866.24

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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.