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Finding the Fourth Proportional to 476.71, 657.63 and 299.89

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Solution

The fourth proportional to 476.71, 657.63 and 299.89 is: 413.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.71 : 657.63 = 299.89 : x
  2. Step 2: Convert to fraction form
    476.71/657.63 = 299.89/x
  3. Step 3: Cross multiply
    476.71x = 657.63 × 299.89
  4. Step 4: Simplify right side
    476.71x = 197,216.66
  5. Step 5: Solve for x
    x = 197,216.66/476.71
  6. Step 6: Final answer
    x = 413.70

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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.