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Finding the Fourth Proportional to 393,907.70, 591,007.35 and 157,420.10

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Solution

The fourth proportional to 393,907.70, 591,007.35 and 157,420.10 is: 236,188.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,907.70 : 591,007.35 = 157,420.10 : x
  2. Step 2: Convert to fraction form
    393,907.70/591,007.35 = 157,420.10/x
  3. Step 3: Cross multiply
    393,907.70x = 591,007.35 × 157,420.10
  4. Step 4: Simplify right side
    393,907.70x = 93,036,436,137.74
  5. Step 5: Solve for x
    x = 93,036,436,137.74/393,907.70
  6. Step 6: Final answer
    x = 236,188.42

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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.