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Finding the Fourth Proportional to 662,787.87, 992,802.43 and 421,707.57

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Solution

The fourth proportional to 662,787.87, 992,802.43 and 421,707.57 is: 631,683.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,787.87 : 992,802.43 = 421,707.57 : x
  2. Step 2: Convert to fraction form
    662,787.87/992,802.43 = 421,707.57/x
  3. Step 3: Cross multiply
    662,787.87x = 992,802.43 × 421,707.57
  4. Step 4: Simplify right side
    662,787.87x = 418,672,300,245.40
  5. Step 5: Solve for x
    x = 418,672,300,245.40/662,787.87
  6. Step 6: Final answer
    x = 631,683.71

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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.