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Finding the Fourth Proportional to 987,395.52, 1,478,698.99 and 682,935.20

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Solution

The fourth proportional to 987,395.52, 1,478,698.99 and 682,935.20 is: 1,022,746.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,395.52 : 1,478,698.99 = 682,935.20 : x
  2. Step 2: Convert to fraction form
    987,395.52/1,478,698.99 = 682,935.20/x
  3. Step 3: Cross multiply
    987,395.52x = 1,478,698.99 × 682,935.20
  4. Step 4: Simplify right side
    987,395.52x = 1,009,855,590,761.25
  5. Step 5: Solve for x
    x = 1,009,855,590,761.25/987,395.52
  6. Step 6: Final answer
    x = 1,022,746.78

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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.