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Finding the Fourth Proportional to 559,981.70, 839,972.55 and 489,997.70

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Solution

The fourth proportional to 559,981.70, 839,972.55 and 489,997.70 is: 734,996.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,981.70 : 839,972.55 = 489,997.70 : x
  2. Step 2: Convert to fraction form
    559,981.70/839,972.55 = 489,997.70/x
  3. Step 3: Cross multiply
    559,981.70x = 839,972.55 × 489,997.70
  4. Step 4: Simplify right side
    559,981.70x = 411,584,617,563.14
  5. Step 5: Solve for x
    x = 411,584,617,563.14/559,981.70
  6. Step 6: Final answer
    x = 734,996.55

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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.