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Finding the Fourth Proportional to 559,954.80, 839,932.20 and 489,970.80

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Solution

The fourth proportional to 559,954.80, 839,932.20 and 489,970.80 is: 734,956.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,954.80 : 839,932.20 = 489,970.80 : x
  2. Step 2: Convert to fraction form
    559,954.80/839,932.20 = 489,970.80/x
  3. Step 3: Cross multiply
    559,954.80x = 839,932.20 × 489,970.80
  4. Step 4: Simplify right side
    559,954.80x = 411,542,251,979.76
  5. Step 5: Solve for x
    x = 411,542,251,979.76/559,954.80
  6. Step 6: Final answer
    x = 734,956.20

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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.