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Finding the Fourth Proportional to 312,031.80, 468,047.70 and 272,665.80

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Solution

The fourth proportional to 312,031.80, 468,047.70 and 272,665.80 is: 408,998.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,031.80 : 468,047.70 = 272,665.80 : x
  2. Step 2: Convert to fraction form
    312,031.80/468,047.70 = 272,665.80/x
  3. Step 3: Cross multiply
    312,031.80x = 468,047.70 × 272,665.80
  4. Step 4: Simplify right side
    312,031.80x = 127,620,600,558.66
  5. Step 5: Solve for x
    x = 127,620,600,558.66/312,031.80
  6. Step 6: Final answer
    x = 408,998.70

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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.