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Finding the Fourth Proportional to 920.99, 1,270.23 and 651.33

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Solution

The fourth proportional to 920.99, 1,270.23 and 651.33 is: 898.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.99 : 1,270.23 = 651.33 : x
  2. Step 2: Convert to fraction form
    920.99/1,270.23 = 651.33/x
  3. Step 3: Cross multiply
    920.99x = 1,270.23 × 651.33
  4. Step 4: Simplify right side
    920.99x = 827,340.53
  5. Step 5: Solve for x
    x = 827,340.53/920.99
  6. Step 6: Final answer
    x = 898.32

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Double scale
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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.