Home / 723,128.89-997,896.25-396,430.73

Finding the Fourth Proportional to 723,128.89, 997,896.25 and 396,430.73

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Solution

The fourth proportional to 723,128.89, 997,896.25 and 396,430.73 is: 547,062.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,128.89 : 997,896.25 = 396,430.73 : x
  2. Step 2: Convert to fraction form
    723,128.89/997,896.25 = 396,430.73/x
  3. Step 3: Cross multiply
    723,128.89x = 997,896.25 × 396,430.73
  4. Step 4: Simplify right side
    723,128.89x = 395,596,738,851.76
  5. Step 5: Solve for x
    x = 395,596,738,851.76/723,128.89
  6. Step 6: Final answer
    x = 547,062.56

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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.