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Finding the Fourth Proportional to 476.07, 656.93 and 279.55

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Solution

The fourth proportional to 476.07, 656.93 and 279.55 is: 385.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.07 : 656.93 = 279.55 : x
  2. Step 2: Convert to fraction form
    476.07/656.93 = 279.55/x
  3. Step 3: Cross multiply
    476.07x = 656.93 × 279.55
  4. Step 4: Simplify right side
    476.07x = 183,641.50
  5. Step 5: Solve for x
    x = 183,641.50/476.07
  6. Step 6: Final answer
    x = 385.74

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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.