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Finding the Fourth Proportional to 985.44, 1,477.22 and 335.72

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Solution

The fourth proportional to 985.44, 1,477.22 and 335.72 is: 503.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.44 : 1,477.22 = 335.72 : x
  2. Step 2: Convert to fraction form
    985.44/1,477.22 = 335.72/x
  3. Step 3: Cross multiply
    985.44x = 1,477.22 × 335.72
  4. Step 4: Simplify right side
    985.44x = 495,932.30
  5. Step 5: Solve for x
    x = 495,932.30/985.44
  6. Step 6: Final answer
    x = 503.26

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.