Home / 1,128,385.71-1,557,277.74-644,856.42

Finding the Fourth Proportional to 1,128,385.71, 1,557,277.74 and 644,856.42

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Solution

The fourth proportional to 1,128,385.71, 1,557,277.74 and 644,856.42 is: 889,962.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128,385.71 : 1,557,277.74 = 644,856.42 : x
  2. Step 2: Convert to fraction form
    1,128,385.71/1,557,277.74 = 644,856.42/x
  3. Step 3: Cross multiply
    1,128,385.71x = 1,557,277.74 × 644,856.42
  4. Step 4: Simplify right side
    1,128,385.71x = 1,004,220,548,362.09
  5. Step 5: Solve for x
    x = 1,004,220,548,362.09/1,128,385.71
  6. Step 6: Final answer
    x = 889,962.13

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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.