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Finding the Fourth Proportional to 901.34, 1,244.22 and 639.98

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Solution

The fourth proportional to 901.34, 1,244.22 and 639.98 is: 883.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.34 : 1,244.22 = 639.98 : x
  2. Step 2: Convert to fraction form
    901.34/1,244.22 = 639.98/x
  3. Step 3: Cross multiply
    901.34x = 1,244.22 × 639.98
  4. Step 4: Simplify right side
    901.34x = 796,275.92
  5. Step 5: Solve for x
    x = 796,275.92/901.34
  6. Step 6: Final answer
    x = 883.44

Related Problems

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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.