Home / 728,390.05-1,005,251.75-422,559.97

Finding the Fourth Proportional to 728,390.05, 1,005,251.75 and 422,559.97

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Solution

The fourth proportional to 728,390.05, 1,005,251.75 and 422,559.97 is: 583,175.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,390.05 : 1,005,251.75 = 422,559.97 : x
  2. Step 2: Convert to fraction form
    728,390.05/1,005,251.75 = 422,559.97/x
  3. Step 3: Cross multiply
    728,390.05x = 1,005,251.75 × 422,559.97
  4. Step 4: Simplify right side
    728,390.05x = 424,779,146,281.12
  5. Step 5: Solve for x
    x = 424,779,146,281.12/728,390.05
  6. Step 6: Final answer
    x = 583,175.38

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1.5x scale

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.