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Finding the Fourth Proportional to 421,757.76, 634,154.04 and 388,880.04

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Solution

The fourth proportional to 421,757.76, 634,154.04 and 388,880.04 is: 584,719.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,757.76 : 634,154.04 = 388,880.04 : x
  2. Step 2: Convert to fraction form
    421,757.76/634,154.04 = 388,880.04/x
  3. Step 3: Cross multiply
    421,757.76x = 634,154.04 × 388,880.04
  4. Step 4: Simplify right side
    421,757.76x = 246,609,848,441.36
  5. Step 5: Solve for x
    x = 246,609,848,441.36/421,757.76
  6. Step 6: Final answer
    x = 584,719.17

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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.