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Finding the Fourth Proportional to 519,989.73, 780,023.81 and 155,222.53

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Solution

The fourth proportional to 519,989.73, 780,023.81 and 155,222.53 is: 232,845.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,989.73 : 780,023.81 = 155,222.53 : x
  2. Step 2: Convert to fraction form
    519,989.73/780,023.81 = 155,222.53/x
  3. Step 3: Cross multiply
    519,989.73x = 780,023.81 × 155,222.53
  4. Step 4: Simplify right side
    519,989.73x = 121,077,264,960.26
  5. Step 5: Solve for x
    x = 121,077,264,960.26/519,989.73
  6. Step 6: Final answer
    x = 232,845.49

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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.