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Finding the Fourth Proportional to 713,402.67, 984,495.44 and 391,105.85

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Solution

The fourth proportional to 713,402.67, 984,495.44 and 391,105.85 is: 539,725.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,402.67 : 984,495.44 = 391,105.85 : x
  2. Step 2: Convert to fraction form
    713,402.67/984,495.44 = 391,105.85/x
  3. Step 3: Cross multiply
    713,402.67x = 984,495.44 × 391,105.85
  4. Step 4: Simplify right side
    713,402.67x = 385,041,925,629.47
  5. Step 5: Solve for x
    x = 385,041,925,629.47/713,402.67
  6. Step 6: Final answer
    x = 539,725.94

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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.