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Finding the Fourth Proportional to 847.25, 1,270.50 and 385.01

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Solution

The fourth proportional to 847.25, 1,270.50 and 385.01 is: 577.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.25 : 1,270.50 = 385.01 : x
  2. Step 2: Convert to fraction form
    847.25/1,270.50 = 385.01/x
  3. Step 3: Cross multiply
    847.25x = 1,270.50 × 385.01
  4. Step 4: Simplify right side
    847.25x = 489,155.21
  5. Step 5: Solve for x
    x = 489,155.21/847.25
  6. Step 6: Final answer
    x = 577.34

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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.