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Finding the Fourth Proportional to 907.72, 1,252.34 and 672.17

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Solution

The fourth proportional to 907.72, 1,252.34 and 672.17 is: 927.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.72 : 1,252.34 = 672.17 : x
  2. Step 2: Convert to fraction form
    907.72/1,252.34 = 672.17/x
  3. Step 3: Cross multiply
    907.72x = 1,252.34 × 672.17
  4. Step 4: Simplify right side
    907.72x = 841,776.39
  5. Step 5: Solve for x
    x = 841,776.39/907.72
  6. Step 6: Final answer
    x = 927.35

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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.