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Finding the Fourth Proportional to 456.83, 630.53 and 309.60

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Solution

The fourth proportional to 456.83, 630.53 and 309.60 is: 427.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.83 : 630.53 = 309.60 : x
  2. Step 2: Convert to fraction form
    456.83/630.53 = 309.60/x
  3. Step 3: Cross multiply
    456.83x = 630.53 × 309.60
  4. Step 4: Simplify right side
    456.83x = 195,210.54
  5. Step 5: Solve for x
    x = 195,210.54/456.83
  6. Step 6: Final answer
    x = 427.32

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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.