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Finding the Fourth Proportional to 985.57, 1,477.44 and 335.85

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Solution

The fourth proportional to 985.57, 1,477.44 and 335.85 is: 503.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.57 : 1,477.44 = 335.85 : x
  2. Step 2: Convert to fraction form
    985.57/1,477.44 = 335.85/x
  3. Step 3: Cross multiply
    985.57x = 1,477.44 × 335.85
  4. Step 4: Simplify right side
    985.57x = 496,198.22
  5. Step 5: Solve for x
    x = 496,198.22/985.57
  6. Step 6: Final answer
    x = 503.46

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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.