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Finding the Fourth Proportional to 907.55, 1,252.41 and 493.55

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Solution

The fourth proportional to 907.55, 1,252.41 and 493.55 is: 681.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.55 : 1,252.41 = 493.55 : x
  2. Step 2: Convert to fraction form
    907.55/1,252.41 = 493.55/x
  3. Step 3: Cross multiply
    907.55x = 1,252.41 × 493.55
  4. Step 4: Simplify right side
    907.55x = 618,126.96
  5. Step 5: Solve for x
    x = 618,126.96/907.55
  6. Step 6: Final answer
    x = 681.09

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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.