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Finding the Fourth Proportional to 901.33, 1,243.34 and 621.07

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Solution

The fourth proportional to 901.33, 1,243.34 and 621.07 is: 856.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.33 : 1,243.34 = 621.07 : x
  2. Step 2: Convert to fraction form
    901.33/1,243.34 = 621.07/x
  3. Step 3: Cross multiply
    901.33x = 1,243.34 × 621.07
  4. Step 4: Simplify right side
    901.33x = 772,201.17
  5. Step 5: Solve for x
    x = 772,201.17/901.33
  6. Step 6: Final answer
    x = 856.74

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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.