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Finding the Fourth Proportional to 1,294,917.12, 1,786,677.76 and 785,606.40

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Solution

The fourth proportional to 1,294,917.12, 1,786,677.76 and 785,606.40 is: 1,083,950.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294,917.12 : 1,786,677.76 = 785,606.40 : x
  2. Step 2: Convert to fraction form
    1,294,917.12/1,786,677.76 = 785,606.40/x
  3. Step 3: Cross multiply
    1,294,917.12x = 1,786,677.76 × 785,606.40
  4. Step 4: Simplify right side
    1,294,917.12x = 1,403,625,482,993.66
  5. Step 5: Solve for x
    x = 1,403,625,482,993.66/1,294,917.12
  6. Step 6: Final answer
    x = 1,083,950.05

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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.