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Finding the Fourth Proportional to 907.02, 1,252.85 and 671.31

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Solution

The fourth proportional to 907.02, 1,252.85 and 671.31 is: 927.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.02 : 1,252.85 = 671.31 : x
  2. Step 2: Convert to fraction form
    907.02/1,252.85 = 671.31/x
  3. Step 3: Cross multiply
    907.02x = 1,252.85 × 671.31
  4. Step 4: Simplify right side
    907.02x = 841,047.38
  5. Step 5: Solve for x
    x = 841,047.38/907.02
  6. Step 6: Final answer
    x = 927.26

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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.