Home / 688,992,792.48-950,788,861.20-391,667,513.76

Finding the Fourth Proportional to 688,992,792.48, 950,788,861.20 and 391,667,513.76

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Solution

The fourth proportional to 688,992,792.48, 950,788,861.20 and 391,667,513.76 is: 540,489,121.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,992,792.48 : 950,788,861.20 = 391,667,513.76 : x
  2. Step 2: Convert to fraction form
    688,992,792.48/950,788,861.20 = 391,667,513.76/x
  3. Step 3: Cross multiply
    688,992,792.48x = 950,788,861.20 × 391,667,513.76
  4. Step 4: Simplify right side
    688,992,792.48x = 372,393,109,376,905,728
  5. Step 5: Solve for x
    x = 372,393,109,376,905,728/688,992,792.48
  6. Step 6: Final answer
    x = 540,489,121.86

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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.