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Finding the Fourth Proportional to 647,042.70, 970,564.05 and 618,012.30

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Solution

The fourth proportional to 647,042.70, 970,564.05 and 618,012.30 is: 927,018.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,042.70 : 970,564.05 = 618,012.30 : x
  2. Step 2: Convert to fraction form
    647,042.70/970,564.05 = 618,012.30/x
  3. Step 3: Cross multiply
    647,042.70x = 970,564.05 × 618,012.30
  4. Step 4: Simplify right side
    647,042.70x = 599,820,520,837.82
  5. Step 5: Solve for x
    x = 599,820,520,837.82/647,042.70
  6. Step 6: Final answer
    x = 927,018.45

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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.