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Finding the Fourth Proportional to 898.21, 1,240.14 and 662.19

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Solution

The fourth proportional to 898.21, 1,240.14 and 662.19 is: 914.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.21 : 1,240.14 = 662.19 : x
  2. Step 2: Convert to fraction form
    898.21/1,240.14 = 662.19/x
  3. Step 3: Cross multiply
    898.21x = 1,240.14 × 662.19
  4. Step 4: Simplify right side
    898.21x = 821,208.31
  5. Step 5: Solve for x
    x = 821,208.31/898.21
  6. Step 6: Final answer
    x = 914.27

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Half scale
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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.