Home / 1,225,407.40-1,689,187.98-861,840.52

Finding the Fourth Proportional to 1,225,407.40, 1,689,187.98 and 861,840.52

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Solution

The fourth proportional to 1,225,407.40, 1,689,187.98 and 861,840.52 is: 1,188,021.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225,407.40 : 1,689,187.98 = 861,840.52 : x
  2. Step 2: Convert to fraction form
    1,225,407.40/1,689,187.98 = 861,840.52/x
  3. Step 3: Cross multiply
    1,225,407.40x = 1,689,187.98 × 861,840.52
  4. Step 4: Simplify right side
    1,225,407.40x = 1,455,810,647,060.95
  5. Step 5: Solve for x
    x = 1,455,810,647,060.95/1,225,407.40
  6. Step 6: Final answer
    x = 1,188,021.75

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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.