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Finding the Fourth Proportional to 519,285.30, 778,870.35 and 425,627.70

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Solution

The fourth proportional to 519,285.30, 778,870.35 and 425,627.70 is: 638,394.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,285.30 : 778,870.35 = 425,627.70 : x
  2. Step 2: Convert to fraction form
    519,285.30/778,870.35 = 425,627.70/x
  3. Step 3: Cross multiply
    519,285.30x = 778,870.35 × 425,627.70
  4. Step 4: Simplify right side
    519,285.30x = 331,508,795,668.70
  5. Step 5: Solve for x
    x = 331,508,795,668.70/519,285.30
  6. Step 6: Final answer
    x = 638,394.34

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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.