Home / 728,348.48-1,005,129.78-422,495.72

Finding the Fourth Proportional to 728,348.48, 1,005,129.78 and 422,495.72

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Solution

The fourth proportional to 728,348.48, 1,005,129.78 and 422,495.72 is: 583,049.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,348.48 : 1,005,129.78 = 422,495.72 : x
  2. Step 2: Convert to fraction form
    728,348.48/1,005,129.78 = 422,495.72/x
  3. Step 3: Cross multiply
    728,348.48x = 1,005,129.78 × 422,495.72
  4. Step 4: Simplify right side
    728,348.48x = 424,663,030,094.54
  5. Step 5: Solve for x
    x = 424,663,030,094.54/728,348.48
  6. Step 6: Final answer
    x = 583,049.24

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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.