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Finding the Fourth Proportional to 879,793.92, 1,319,820.80 and 318,697.60

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Solution

The fourth proportional to 879,793.92, 1,319,820.80 and 318,697.60 is: 478,093.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,793.92 : 1,319,820.80 = 318,697.60 : x
  2. Step 2: Convert to fraction form
    879,793.92/1,319,820.80 = 318,697.60/x
  3. Step 3: Cross multiply
    879,793.92x = 1,319,820.80 × 318,697.60
  4. Step 4: Simplify right side
    879,793.92x = 420,623,721,390.08
  5. Step 5: Solve for x
    x = 420,623,721,390.08/879,793.92
  6. Step 6: Final answer
    x = 478,093.46

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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.