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Finding the Fourth Proportional to 548,726.60, 823,089.90 and 489,240.20

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Solution

The fourth proportional to 548,726.60, 823,089.90 and 489,240.20 is: 733,860.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,726.60 : 823,089.90 = 489,240.20 : x
  2. Step 2: Convert to fraction form
    548,726.60/823,089.90 = 489,240.20/x
  3. Step 3: Cross multiply
    548,726.60x = 823,089.90 × 489,240.20
  4. Step 4: Simplify right side
    548,726.60x = 402,688,667,293.98
  5. Step 5: Solve for x
    x = 402,688,667,293.98/548,726.60
  6. Step 6: Final answer
    x = 733,860.30

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Double scale
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Similar ratio
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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.