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Finding the Fourth Proportional to 495.99, 684.78 and 465

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Solution

The fourth proportional to 495.99, 684.78 and 465 is: 641.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.99 : 684.78 = 465 : x
  2. Step 2: Convert to fraction form
    495.99/684.78 = 465/x
  3. Step 3: Cross multiply
    495.99x = 684.78 × 465
  4. Step 4: Simplify right side
    495.99x = 318,422.70
  5. Step 5: Solve for x
    x = 318,422.70/495.99
  6. Step 6: Final answer
    x = 641.99

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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.