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Finding the Fourth Proportional to 286,119.20, 430,215.60 and 279,898.40

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Solution

The fourth proportional to 286,119.20, 430,215.60 and 279,898.40 is: 420,861.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,119.20 : 430,215.60 = 279,898.40 : x
  2. Step 2: Convert to fraction form
    286,119.20/430,215.60 = 279,898.40/x
  3. Step 3: Cross multiply
    286,119.20x = 430,215.60 × 279,898.40
  4. Step 4: Simplify right side
    286,119.20x = 120,416,658,095.04
  5. Step 5: Solve for x
    x = 120,416,658,095.04/286,119.20
  6. Step 6: Final answer
    x = 420,861.86

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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.