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Finding the Fourth Proportional to 907.19, 1,252.52 and 628.28

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Solution

The fourth proportional to 907.19, 1,252.52 and 628.28 is: 867.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.19 : 1,252.52 = 628.28 : x
  2. Step 2: Convert to fraction form
    907.19/1,252.52 = 628.28/x
  3. Step 3: Cross multiply
    907.19x = 1,252.52 × 628.28
  4. Step 4: Simplify right side
    907.19x = 786,934.88
  5. Step 5: Solve for x
    x = 786,934.88/907.19
  6. Step 6: Final answer
    x = 867.44

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Double scale
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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.