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Finding the Fourth Proportional to 920.06, 1,269.38 and 526.80

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Solution

The fourth proportional to 920.06, 1,269.38 and 526.80 is: 726.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.06 : 1,269.38 = 526.80 : x
  2. Step 2: Convert to fraction form
    920.06/1,269.38 = 526.80/x
  3. Step 3: Cross multiply
    920.06x = 1,269.38 × 526.80
  4. Step 4: Simplify right side
    920.06x = 668,709.38
  5. Step 5: Solve for x
    x = 668,709.38/920.06
  6. Step 6: Final answer
    x = 726.81

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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.