Home / 1,187,070.45-1,638,187.71-728,438.43

Finding the Fourth Proportional to 1,187,070.45, 1,638,187.71 and 728,438.43

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Solution

The fourth proportional to 1,187,070.45, 1,638,187.71 and 728,438.43 is: 1,005,263.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,070.45 : 1,638,187.71 = 728,438.43 : x
  2. Step 2: Convert to fraction form
    1,187,070.45/1,638,187.71 = 728,438.43/x
  3. Step 3: Cross multiply
    1,187,070.45x = 1,638,187.71 × 728,438.43
  4. Step 4: Simplify right side
    1,187,070.45x = 1,193,318,883,517.70
  5. Step 5: Solve for x
    x = 1,193,318,883,517.70/1,187,070.45
  6. Step 6: Final answer
    x = 1,005,263.74

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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.