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Finding the Fourth Proportional to 615,163.20, 921,751.20 and 348,129.60

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Solution

The fourth proportional to 615,163.20, 921,751.20 and 348,129.60 is: 521,632.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,163.20 : 921,751.20 = 348,129.60 : x
  2. Step 2: Convert to fraction form
    615,163.20/921,751.20 = 348,129.60/x
  3. Step 3: Cross multiply
    615,163.20x = 921,751.20 × 348,129.60
  4. Step 4: Simplify right side
    615,163.20x = 320,888,876,555.52
  5. Step 5: Solve for x
    x = 320,888,876,555.52/615,163.20
  6. Step 6: Final answer
    x = 521,632.11

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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.