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Finding the Fourth Proportional to 1,298,669.90, 1,792,138.02 and 717,917.52

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Solution

The fourth proportional to 1,298,669.90, 1,792,138.02 and 717,917.52 is: 990,711.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298,669.90 : 1,792,138.02 = 717,917.52 : x
  2. Step 2: Convert to fraction form
    1,298,669.90/1,792,138.02 = 717,917.52/x
  3. Step 3: Cross multiply
    1,298,669.90x = 1,792,138.02 × 717,917.52
  4. Step 4: Simplify right side
    1,298,669.90x = 1,286,607,282,816.11
  5. Step 5: Solve for x
    x = 1,286,607,282,816.11/1,298,669.90
  6. Step 6: Final answer
    x = 990,711.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.