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Finding the Fourth Proportional to 345.60, 476.56 and 266.92

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Solution

The fourth proportional to 345.60, 476.56 and 266.92 is: 368.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.60 : 476.56 = 266.92 : x
  2. Step 2: Convert to fraction form
    345.60/476.56 = 266.92/x
  3. Step 3: Cross multiply
    345.60x = 476.56 × 266.92
  4. Step 4: Simplify right side
    345.60x = 127,206.26
  5. Step 5: Solve for x
    x = 127,206.26/345.60
  6. Step 6: Final answer
    x = 368.08

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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.