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Finding the Fourth Proportional to 478.04, 711.81 and 476.01

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Solution

The fourth proportional to 478.04, 711.81 and 476.01 is: 708.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.04 : 711.81 = 476.01 : x
  2. Step 2: Convert to fraction form
    478.04/711.81 = 476.01/x
  3. Step 3: Cross multiply
    478.04x = 711.81 × 476.01
  4. Step 4: Simplify right side
    478.04x = 338,828.68
  5. Step 5: Solve for x
    x = 338,828.68/478.04
  6. Step 6: Final answer
    x = 708.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.