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Finding the Fourth Proportional to 528,043.92, 728,434.60 and 377,228.40

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Solution

The fourth proportional to 528,043.92, 728,434.60 and 377,228.40 is: 520,385.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,043.92 : 728,434.60 = 377,228.40 : x
  2. Step 2: Convert to fraction form
    528,043.92/728,434.60 = 377,228.40/x
  3. Step 3: Cross multiply
    528,043.92x = 728,434.60 × 377,228.40
  4. Step 4: Simplify right side
    528,043.92x = 274,786,218,662.64
  5. Step 5: Solve for x
    x = 274,786,218,662.64/528,043.92
  6. Step 6: Final answer
    x = 520,385.16

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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.