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Finding the Fourth Proportional to 559,936.80, 839,905.20 and 260,317.80

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Solution

The fourth proportional to 559,936.80, 839,905.20 and 260,317.80 is: 390,476.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,936.80 : 839,905.20 = 260,317.80 : x
  2. Step 2: Convert to fraction form
    559,936.80/839,905.20 = 260,317.80/x
  3. Step 3: Cross multiply
    559,936.80x = 839,905.20 × 260,317.80
  4. Step 4: Simplify right side
    559,936.80x = 218,642,273,872.56
  5. Step 5: Solve for x
    x = 218,642,273,872.56/559,936.80
  6. Step 6: Final answer
    x = 390,476.70

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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.