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Finding the Fourth Proportional to 903.34, 1,247.28 and 623.44

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Solution

The fourth proportional to 903.34, 1,247.28 and 623.44 is: 860.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.34 : 1,247.28 = 623.44 : x
  2. Step 2: Convert to fraction form
    903.34/1,247.28 = 623.44/x
  3. Step 3: Cross multiply
    903.34x = 1,247.28 × 623.44
  4. Step 4: Simplify right side
    903.34x = 777,604.24
  5. Step 5: Solve for x
    x = 777,604.24/903.34
  6. Step 6: Final answer
    x = 860.81

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.