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Finding the Fourth Proportional to 570.50, 787.30 and 308.52

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Solution

The fourth proportional to 570.50, 787.30 and 308.52 is: 425.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.50 : 787.30 = 308.52 : x
  2. Step 2: Convert to fraction form
    570.50/787.30 = 308.52/x
  3. Step 3: Cross multiply
    570.50x = 787.30 × 308.52
  4. Step 4: Simplify right side
    570.50x = 242,896.74
  5. Step 5: Solve for x
    x = 242,896.74/570.50
  6. Step 6: Final answer
    x = 425.76

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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.