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Finding the Fourth Proportional to 1,397,488.82, 1,928,602.98 and 785,834.12

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Solution

The fourth proportional to 1,397,488.82, 1,928,602.98 and 785,834.12 is: 1,084,489.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397,488.82 : 1,928,602.98 = 785,834.12 : x
  2. Step 2: Convert to fraction form
    1,397,488.82/1,928,602.98 = 785,834.12/x
  3. Step 3: Cross multiply
    1,397,488.82x = 1,928,602.98 × 785,834.12
  4. Step 4: Simplify right side
    1,397,488.82x = 1,515,562,030,439.19
  5. Step 5: Solve for x
    x = 1,515,562,030,439.19/1,397,488.82
  6. Step 6: Final answer
    x = 1,084,489.56

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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.