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Finding the Fourth Proportional to 219,317.40, 328,392.90 and 140,002.20

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Solution

The fourth proportional to 219,317.40, 328,392.90 and 140,002.20 is: 209,631.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,317.40 : 328,392.90 = 140,002.20 : x
  2. Step 2: Convert to fraction form
    219,317.40/328,392.90 = 140,002.20/x
  3. Step 3: Cross multiply
    219,317.40x = 328,392.90 × 140,002.20
  4. Step 4: Simplify right side
    219,317.40x = 45,975,728,464.38
  5. Step 5: Solve for x
    x = 45,975,728,464.38/219,317.40
  6. Step 6: Final answer
    x = 209,631.01

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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.