Home / 1,005,076.45-1,387,328.75-643,474.23

Finding the Fourth Proportional to 1,005,076.45, 1,387,328.75 and 643,474.23

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Solution

The fourth proportional to 1,005,076.45, 1,387,328.75 and 643,474.23 is: 888,201.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005,076.45 : 1,387,328.75 = 643,474.23 : x
  2. Step 2: Convert to fraction form
    1,005,076.45/1,387,328.75 = 643,474.23/x
  3. Step 3: Cross multiply
    1,005,076.45x = 1,387,328.75 × 643,474.23
  4. Step 4: Simplify right side
    1,005,076.45x = 892,710,299,163.11
  5. Step 5: Solve for x
    x = 892,710,299,163.11/1,005,076.45
  6. Step 6: Final answer
    x = 888,201.39

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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.