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Finding the Fourth Proportional to 578,215.20, 867,711.60 and 262,509.60

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Solution

The fourth proportional to 578,215.20, 867,711.60 and 262,509.60 is: 393,940.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,215.20 : 867,711.60 = 262,509.60 : x
  2. Step 2: Convert to fraction form
    578,215.20/867,711.60 = 262,509.60/x
  3. Step 3: Cross multiply
    578,215.20x = 867,711.60 × 262,509.60
  4. Step 4: Simplify right side
    578,215.20x = 227,782,625,031.36
  5. Step 5: Solve for x
    x = 227,782,625,031.36/578,215.20
  6. Step 6: Final answer
    x = 393,940.92

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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.