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Finding the Fourth Proportional to 1,225.85, 1,838.81 and 360.16

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Solution

The fourth proportional to 1,225.85, 1,838.81 and 360.16 is: 540.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.85 : 1,838.81 = 360.16 : x
  2. Step 2: Convert to fraction form
    1,225.85/1,838.81 = 360.16/x
  3. Step 3: Cross multiply
    1,225.85x = 1,838.81 × 360.16
  4. Step 4: Simplify right side
    1,225.85x = 662,254.81
  5. Step 5: Solve for x
    x = 662,254.81/1,225.85
  6. Step 6: Final answer
    x = 540.24

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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.