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Finding the Fourth Proportional to 1,009.96, 1,515.08 and 360.80

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Solution

The fourth proportional to 1,009.96, 1,515.08 and 360.80 is: 541.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,009.96 : 1,515.08 = 360.80 : x
  2. Step 2: Convert to fraction form
    1,009.96/1,515.08 = 360.80/x
  3. Step 3: Cross multiply
    1,009.96x = 1,515.08 × 360.80
  4. Step 4: Simplify right side
    1,009.96x = 546,640.86
  5. Step 5: Solve for x
    x = 546,640.86/1,009.96
  6. Step 6: Final answer
    x = 541.25

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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.