Home / 1,221,045.78-1,685,144.06-677,356.86

Finding the Fourth Proportional to 1,221,045.78, 1,685,144.06 and 677,356.86

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Solution

The fourth proportional to 1,221,045.78, 1,685,144.06 and 677,356.86 is: 934,808.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,045.78 : 1,685,144.06 = 677,356.86 : x
  2. Step 2: Convert to fraction form
    1,221,045.78/1,685,144.06 = 677,356.86/x
  3. Step 3: Cross multiply
    1,221,045.78x = 1,685,144.06 × 677,356.86
  4. Step 4: Simplify right side
    1,221,045.78x = 1,141,443,889,129.25
  5. Step 5: Solve for x
    x = 1,141,443,889,129.25/1,221,045.78
  6. Step 6: Final answer
    x = 934,808.43

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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.