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Finding the Fourth Proportional to 472.51, 708.77 and 280

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Solution

The fourth proportional to 472.51, 708.77 and 280 is: 420.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.51 : 708.77 = 280 : x
  2. Step 2: Convert to fraction form
    472.51/708.77 = 280/x
  3. Step 3: Cross multiply
    472.51x = 708.77 × 280
  4. Step 4: Simplify right side
    472.51x = 198,455.60
  5. Step 5: Solve for x
    x = 198,455.60/472.51
  6. Step 6: Final answer
    x = 420.00

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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.