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Finding the Fourth Proportional to 919.88, 1,381.19 and 373.13

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Solution

The fourth proportional to 919.88, 1,381.19 and 373.13 is: 560.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.88 : 1,381.19 = 373.13 : x
  2. Step 2: Convert to fraction form
    919.88/1,381.19 = 373.13/x
  3. Step 3: Cross multiply
    919.88x = 1,381.19 × 373.13
  4. Step 4: Simplify right side
    919.88x = 515,359.83
  5. Step 5: Solve for x
    x = 515,359.83/919.88
  6. Step 6: Final answer
    x = 560.25

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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.