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Finding the Fourth Proportional to 445,518.30, 668,277.45 and 209,322.30

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Solution

The fourth proportional to 445,518.30, 668,277.45 and 209,322.30 is: 313,983.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,518.30 : 668,277.45 = 209,322.30 : x
  2. Step 2: Convert to fraction form
    445,518.30/668,277.45 = 209,322.30/x
  3. Step 3: Cross multiply
    445,518.30x = 668,277.45 × 209,322.30
  4. Step 4: Simplify right side
    445,518.30x = 139,885,372,872.14
  5. Step 5: Solve for x
    x = 139,885,372,872.14/445,518.30
  6. Step 6: Final answer
    x = 313,983.45

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Similar ratio
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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.