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Finding the Fourth Proportional to 624,698.20, 936,770.28 and 287,657.20

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Solution

The fourth proportional to 624,698.20, 936,770.28 and 287,657.20 is: 431,358.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,698.20 : 936,770.28 = 287,657.20 : x
  2. Step 2: Convert to fraction form
    624,698.20/936,770.28 = 287,657.20/x
  3. Step 3: Cross multiply
    624,698.20x = 936,770.28 × 287,657.20
  4. Step 4: Simplify right side
    624,698.20x = 269,468,715,788.02
  5. Step 5: Solve for x
    x = 269,468,715,788.02/624,698.20
  6. Step 6: Final answer
    x = 431,358.24

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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.