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Finding the Fourth Proportional to 300,319.49, 450,484.86 and 140,351.52

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Solution

The fourth proportional to 300,319.49, 450,484.86 and 140,351.52 is: 210,529.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,319.49 : 450,484.86 = 140,351.52 : x
  2. Step 2: Convert to fraction form
    300,319.49/450,484.86 = 140,351.52/x
  3. Step 3: Cross multiply
    300,319.49x = 450,484.86 × 140,351.52
  4. Step 4: Simplify right side
    300,319.49x = 63,226,234,837.99
  5. Step 5: Solve for x
    x = 63,226,234,837.99/300,319.49
  6. Step 6: Final answer
    x = 210,529.91

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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.