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Finding the Fourth Proportional to 456.98, 685.94 and 455.36

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Solution

The fourth proportional to 456.98, 685.94 and 455.36 is: 683.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.98 : 685.94 = 455.36 : x
  2. Step 2: Convert to fraction form
    456.98/685.94 = 455.36/x
  3. Step 3: Cross multiply
    456.98x = 685.94 × 455.36
  4. Step 4: Simplify right side
    456.98x = 312,343.93
  5. Step 5: Solve for x
    x = 312,343.93/456.98
  6. Step 6: Final answer
    x = 683.50

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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.