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Finding the Fourth Proportional to 463.87, 639.79 and 340.03

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Solution

The fourth proportional to 463.87, 639.79 and 340.03 is: 468.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.87 : 639.79 = 340.03 : x
  2. Step 2: Convert to fraction form
    463.87/639.79 = 340.03/x
  3. Step 3: Cross multiply
    463.87x = 639.79 × 340.03
  4. Step 4: Simplify right side
    463.87x = 217,547.79
  5. Step 5: Solve for x
    x = 217,547.79/463.87
  6. Step 6: Final answer
    x = 468.98

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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.