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Finding the Fourth Proportional to 985.53, 1,478.55 and 336.27

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Solution

The fourth proportional to 985.53, 1,478.55 and 336.27 is: 504.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.53 : 1,478.55 = 336.27 : x
  2. Step 2: Convert to fraction form
    985.53/1,478.55 = 336.27/x
  3. Step 3: Cross multiply
    985.53x = 1,478.55 × 336.27
  4. Step 4: Simplify right side
    985.53x = 497,192.01
  5. Step 5: Solve for x
    x = 497,192.01/985.53
  6. Step 6: Final answer
    x = 504.49

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.