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Finding the Fourth Proportional to 189,425.20, 284,368.20 and 142,308.40

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Solution

The fourth proportional to 189,425.20, 284,368.20 and 142,308.40 is: 213,635.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,425.20 : 284,368.20 = 142,308.40 : x
  2. Step 2: Convert to fraction form
    189,425.20/284,368.20 = 142,308.40/x
  3. Step 3: Cross multiply
    189,425.20x = 284,368.20 × 142,308.40
  4. Step 4: Simplify right side
    189,425.20x = 40,467,983,552.88
  5. Step 5: Solve for x
    x = 40,467,983,552.88/189,425.20
  6. Step 6: Final answer
    x = 213,635.69

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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.