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Finding the Fourth Proportional to 519,528.80, 779,235.60 and 425,871.20

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Solution

The fourth proportional to 519,528.80, 779,235.60 and 425,871.20 is: 638,759.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,528.80 : 779,235.60 = 425,871.20 : x
  2. Step 2: Convert to fraction form
    519,528.80/779,235.60 = 425,871.20/x
  3. Step 3: Cross multiply
    519,528.80x = 779,235.60 × 425,871.20
  4. Step 4: Simplify right side
    519,528.80x = 331,854,000,054.72
  5. Step 5: Solve for x
    x = 331,854,000,054.72/519,528.80
  6. Step 6: Final answer
    x = 638,759.58

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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.