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Finding the Fourth Proportional to 528,591.92, 729,351.32 and 321,721.74

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Solution

The fourth proportional to 528,591.92, 729,351.32 and 321,721.74 is: 443,911.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,591.92 : 729,351.32 = 321,721.74 : x
  2. Step 2: Convert to fraction form
    528,591.92/729,351.32 = 321,721.74/x
  3. Step 3: Cross multiply
    528,591.92x = 729,351.32 × 321,721.74
  4. Step 4: Simplify right side
    528,591.92x = 234,648,174,133.09
  5. Step 5: Solve for x
    x = 234,648,174,133.09/528,591.92
  6. Step 6: Final answer
    x = 443,911.77

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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.