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Finding the Fourth Proportional to 519,725.80, 778,422.30 and 426,413.80

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Solution

The fourth proportional to 519,725.80, 778,422.30 and 426,413.80 is: 638,663.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,725.80 : 778,422.30 = 426,413.80 : x
  2. Step 2: Convert to fraction form
    519,725.80/778,422.30 = 426,413.80/x
  3. Step 3: Cross multiply
    519,725.80x = 778,422.30 × 426,413.80
  4. Step 4: Simplify right side
    519,725.80x = 331,930,010,947.74
  5. Step 5: Solve for x
    x = 331,930,010,947.74/519,725.80
  6. Step 6: Final answer
    x = 638,663.72

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1.5x scale

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.