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Finding the Fourth Proportional to 624,419.70, 936,352.53 and 287,378.70

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Solution

The fourth proportional to 624,419.70, 936,352.53 and 287,378.70 is: 430,940.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,419.70 : 936,352.53 = 287,378.70 : x
  2. Step 2: Convert to fraction form
    624,419.70/936,352.53 = 287,378.70/x
  3. Step 3: Cross multiply
    624,419.70x = 936,352.53 × 287,378.70
  4. Step 4: Simplify right side
    624,419.70x = 269,087,772,813.11
  5. Step 5: Solve for x
    x = 269,087,772,813.11/624,419.70
  6. Step 6: Final answer
    x = 430,940.56

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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.