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Finding the Fourth Proportional to 528,812.72, 792,921 and 173,731.40

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Solution

The fourth proportional to 528,812.72, 792,921 and 173,731.40 is: 260,499.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,812.72 : 792,921 = 173,731.40 : x
  2. Step 2: Convert to fraction form
    528,812.72/792,921 = 173,731.40/x
  3. Step 3: Cross multiply
    528,812.72x = 792,921 × 173,731.40
  4. Step 4: Simplify right side
    528,812.72x = 137,755,275,419.40
  5. Step 5: Solve for x
    x = 137,755,275,419.40/528,812.72
  6. Step 6: Final answer
    x = 260,499.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.