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Finding the Fourth Proportional to 879,984.80, 1,319,977.20 and 520,733.60

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Solution

The fourth proportional to 879,984.80, 1,319,977.20 and 520,733.60 is: 781,100.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,984.80 : 1,319,977.20 = 520,733.60 : x
  2. Step 2: Convert to fraction form
    879,984.80/1,319,977.20 = 520,733.60/x
  3. Step 3: Cross multiply
    879,984.80x = 1,319,977.20 × 520,733.60
  4. Step 4: Simplify right side
    879,984.80x = 687,356,479,273.92
  5. Step 5: Solve for x
    x = 687,356,479,273.92/879,984.80
  6. Step 6: Final answer
    x = 781,100.40

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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.