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Finding the Fourth Proportional to 1,294,693.74, 1,786,887.87 and 778,968.90

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Solution

The fourth proportional to 1,294,693.74, 1,786,887.87 and 778,968.90 is: 1,075,103.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294,693.74 : 1,786,887.87 = 778,968.90 : x
  2. Step 2: Convert to fraction form
    1,294,693.74/1,786,887.87 = 778,968.90/x
  3. Step 3: Cross multiply
    1,294,693.74x = 1,786,887.87 × 778,968.90
  4. Step 4: Simplify right side
    1,294,693.74x = 1,391,930,078,517.24
  5. Step 5: Solve for x
    x = 1,391,930,078,517.24/1,294,693.74
  6. Step 6: Final answer
    x = 1,075,103.74

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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.