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Finding the Fourth Proportional to 647,399.60, 971,329.80 and 624,359.60

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Solution

The fourth proportional to 647,399.60, 971,329.80 and 624,359.60 is: 936,761.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,399.60 : 971,329.80 = 624,359.60 : x
  2. Step 2: Convert to fraction form
    647,399.60/971,329.80 = 624,359.60/x
  3. Step 3: Cross multiply
    647,399.60x = 971,329.80 × 624,359.60
  4. Step 4: Simplify right side
    647,399.60x = 606,459,085,396.08
  5. Step 5: Solve for x
    x = 606,459,085,396.08/647,399.60
  6. Step 6: Final answer
    x = 936,761.60

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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.