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Finding the Fourth Proportional to 1,293,520.75, 1,938,809.73 and 786,965.13

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Solution

The fourth proportional to 1,293,520.75, 1,938,809.73 and 786,965.13 is: 1,179,552.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293,520.75 : 1,938,809.73 = 786,965.13 : x
  2. Step 2: Convert to fraction form
    1,293,520.75/1,938,809.73 = 786,965.13/x
  3. Step 3: Cross multiply
    1,293,520.75x = 1,938,809.73 × 786,965.13
  4. Step 4: Simplify right side
    1,293,520.75x = 1,525,775,651,214.72
  5. Step 5: Solve for x
    x = 1,525,775,651,214.72/1,293,520.75
  6. Step 6: Final answer
    x = 1,179,552.51

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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.