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Finding the Fourth Proportional to 2,380.50, 3,570.98 and 649.13

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Solution

The fourth proportional to 2,380.50, 3,570.98 and 649.13 is: 973.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,380.50 : 3,570.98 = 649.13 : x
  2. Step 2: Convert to fraction form
    2,380.50/3,570.98 = 649.13/x
  3. Step 3: Cross multiply
    2,380.50x = 3,570.98 × 649.13
  4. Step 4: Simplify right side
    2,380.50x = 2,318,009.15
  5. Step 5: Solve for x
    x = 2,318,009.15/2,380.50
  6. Step 6: Final answer
    x = 973.75

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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.