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Finding the Fourth Proportional to 476.80, 714.80 and 260.48

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Solution

The fourth proportional to 476.80, 714.80 and 260.48 is: 390.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.80 : 714.80 = 260.48 : x
  2. Step 2: Convert to fraction form
    476.80/714.80 = 260.48/x
  3. Step 3: Cross multiply
    476.80x = 714.80 × 260.48
  4. Step 4: Simplify right side
    476.80x = 186,191.10
  5. Step 5: Solve for x
    x = 186,191.10/476.80
  6. Step 6: Final answer
    x = 390.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.