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Finding the Fourth Proportional to 476.01, 656.78 and 289.51

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Solution

The fourth proportional to 476.01, 656.78 and 289.51 is: 399.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.01 : 656.78 = 289.51 : x
  2. Step 2: Convert to fraction form
    476.01/656.78 = 289.51/x
  3. Step 3: Cross multiply
    476.01x = 656.78 × 289.51
  4. Step 4: Simplify right side
    476.01x = 190,141.29
  5. Step 5: Solve for x
    x = 190,141.29/476.01
  6. Step 6: Final answer
    x = 399.45

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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.