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Finding the Fourth Proportional to 465,311.52, 642,130.20 and 261,362.88

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Solution

The fourth proportional to 465,311.52, 642,130.20 and 261,362.88 is: 360,680.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,311.52 : 642,130.20 = 261,362.88 : x
  2. Step 2: Convert to fraction form
    465,311.52/642,130.20 = 261,362.88/x
  3. Step 3: Cross multiply
    465,311.52x = 642,130.20 × 261,362.88
  4. Step 4: Simplify right side
    465,311.52x = 167,828,998,406.98
  5. Step 5: Solve for x
    x = 167,828,998,406.98/465,311.52
  6. Step 6: Final answer
    x = 360,680.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.