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Finding the Fourth Proportional to 903.14, 1,245.65 and 623.84

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Solution

The fourth proportional to 903.14, 1,245.65 and 623.84 is: 860.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.14 : 1,245.65 = 623.84 : x
  2. Step 2: Convert to fraction form
    903.14/1,245.65 = 623.84/x
  3. Step 3: Cross multiply
    903.14x = 1,245.65 × 623.84
  4. Step 4: Simplify right side
    903.14x = 777,090.97
  5. Step 5: Solve for x
    x = 777,090.97/903.14
  6. Step 6: Final answer
    x = 860.43

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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.