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Finding the Fourth Proportional to 859,533.32, 1,288,857 and 385,812.62

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Solution

The fourth proportional to 859,533.32, 1,288,857 and 385,812.62 is: 578,520.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,533.32 : 1,288,857 = 385,812.62 : x
  2. Step 2: Convert to fraction form
    859,533.32/1,288,857 = 385,812.62/x
  3. Step 3: Cross multiply
    859,533.32x = 1,288,857 × 385,812.62
  4. Step 4: Simplify right side
    859,533.32x = 497,257,295,975.34
  5. Step 5: Solve for x
    x = 497,257,295,975.34/859,533.32
  6. Step 6: Final answer
    x = 578,520.09

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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.