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Finding the Fourth Proportional to 515,812.60, 773,718.90 and 515,812.60

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Solution

The fourth proportional to 515,812.60, 773,718.90 and 515,812.60 is: 773,718.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,812.60 : 773,718.90 = 515,812.60 : x
  2. Step 2: Convert to fraction form
    515,812.60/773,718.90 = 515,812.60/x
  3. Step 3: Cross multiply
    515,812.60x = 773,718.90 × 515,812.60
  4. Step 4: Simplify right side
    515,812.60x = 399,093,957,478.14
  5. Step 5: Solve for x
    x = 399,093,957,478.14/515,812.60
  6. Step 6: Final answer
    x = 773,718.90

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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.