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Finding the Fourth Proportional to 476.61, 656.37 and 409.74

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Solution

The fourth proportional to 476.61, 656.37 and 409.74 is: 564.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.61 : 656.37 = 409.74 : x
  2. Step 2: Convert to fraction form
    476.61/656.37 = 409.74/x
  3. Step 3: Cross multiply
    476.61x = 656.37 × 409.74
  4. Step 4: Simplify right side
    476.61x = 268,941.04
  5. Step 5: Solve for x
    x = 268,941.04/476.61
  6. Step 6: Final answer
    x = 564.28

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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.