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Finding the Fourth Proportional to 457.04, 630.99 and 309.69

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Solution

The fourth proportional to 457.04, 630.99 and 309.69 is: 427.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.04 : 630.99 = 309.69 : x
  2. Step 2: Convert to fraction form
    457.04/630.99 = 309.69/x
  3. Step 3: Cross multiply
    457.04x = 630.99 × 309.69
  4. Step 4: Simplify right side
    457.04x = 195,411.29
  5. Step 5: Solve for x
    x = 195,411.29/457.04
  6. Step 6: Final answer
    x = 427.56

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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.