Home / 728,347.48-1,005,128.40-422,494.72

Finding the Fourth Proportional to 728,347.48, 1,005,128.40 and 422,494.72

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Solution

The fourth proportional to 728,347.48, 1,005,128.40 and 422,494.72 is: 583,047.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,347.48 : 1,005,128.40 = 422,494.72 : x
  2. Step 2: Convert to fraction form
    728,347.48/1,005,128.40 = 422,494.72/x
  3. Step 3: Cross multiply
    728,347.48x = 1,005,128.40 × 422,494.72
  4. Step 4: Simplify right side
    728,347.48x = 424,661,441,922.05
  5. Step 5: Solve for x
    x = 424,661,441,922.05/728,347.48
  6. Step 6: Final answer
    x = 583,047.86

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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.