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Finding the Fourth Proportional to 370,911.72, 556,361.45 and 118,188.78

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Solution

The fourth proportional to 370,911.72, 556,361.45 and 118,188.78 is: 177,281.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,911.72 : 556,361.45 = 118,188.78 : x
  2. Step 2: Convert to fraction form
    370,911.72/556,361.45 = 118,188.78/x
  3. Step 3: Cross multiply
    370,911.72x = 556,361.45 × 118,188.78
  4. Step 4: Simplify right side
    370,911.72x = 65,755,680,423.59
  5. Step 5: Solve for x
    x = 65,755,680,423.59/370,911.72
  6. Step 6: Final answer
    x = 177,281.22

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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.