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Finding the Fourth Proportional to 909.52, 1,255.07 and 555.41

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Solution

The fourth proportional to 909.52, 1,255.07 and 555.41 is: 766.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.52 : 1,255.07 = 555.41 : x
  2. Step 2: Convert to fraction form
    909.52/1,255.07 = 555.41/x
  3. Step 3: Cross multiply
    909.52x = 1,255.07 × 555.41
  4. Step 4: Simplify right side
    909.52x = 697,072.77
  5. Step 5: Solve for x
    x = 697,072.77/909.52
  6. Step 6: Final answer
    x = 766.42

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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.