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Finding the Fourth Proportional to 521,661.60, 783,010.80 and 255,722.40

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Solution

The fourth proportional to 521,661.60, 783,010.80 and 255,722.40 is: 383,837.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,661.60 : 783,010.80 = 255,722.40 : x
  2. Step 2: Convert to fraction form
    521,661.60/783,010.80 = 255,722.40/x
  3. Step 3: Cross multiply
    521,661.60x = 783,010.80 × 255,722.40
  4. Step 4: Simplify right side
    521,661.60x = 200,233,401,001.92
  5. Step 5: Solve for x
    x = 200,233,401,001.92/521,661.60
  6. Step 6: Final answer
    x = 383,837.72

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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.