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Finding the Fourth Proportional to 528,036.92, 728,424.94 and 377,221.40

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Solution

The fourth proportional to 528,036.92, 728,424.94 and 377,221.40 is: 520,375.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,036.92 : 728,424.94 = 377,221.40 : x
  2. Step 2: Convert to fraction form
    528,036.92/728,424.94 = 377,221.40/x
  3. Step 3: Cross multiply
    528,036.92x = 728,424.94 × 377,221.40
  4. Step 4: Simplify right side
    528,036.92x = 274,777,475,661.72
  5. Step 5: Solve for x
    x = 274,777,475,661.72/528,036.92
  6. Step 6: Final answer
    x = 520,375.50

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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.