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Finding the Fourth Proportional to 559,940.80, 839,911.20 and 260,321.80

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Solution

The fourth proportional to 559,940.80, 839,911.20 and 260,321.80 is: 390,482.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,940.80 : 839,911.20 = 260,321.80 : x
  2. Step 2: Convert to fraction form
    559,940.80/839,911.20 = 260,321.80/x
  3. Step 3: Cross multiply
    559,940.80x = 839,911.20 × 260,321.80
  4. Step 4: Simplify right side
    559,940.80x = 218,647,195,424.16
  5. Step 5: Solve for x
    x = 218,647,195,424.16/559,940.80
  6. Step 6: Final answer
    x = 390,482.70

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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.