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Finding the Fourth Proportional to 647,791.53, 965,038.94 and 618,645.45

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Solution

The fourth proportional to 647,791.53, 965,038.94 and 618,645.45 is: 921,618.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,791.53 : 965,038.94 = 618,645.45 : x
  2. Step 2: Convert to fraction form
    647,791.53/965,038.94 = 618,645.45/x
  3. Step 3: Cross multiply
    647,791.53x = 965,038.94 × 618,645.45
  4. Step 4: Simplify right side
    647,791.53x = 597,016,946,210.60
  5. Step 5: Solve for x
    x = 597,016,946,210.60/647,791.53
  6. Step 6: Final answer
    x = 921,618.94

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.