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Finding the Fourth Proportional to 859,149.72, 1,288,230.72 and 354,059.40

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Solution

The fourth proportional to 859,149.72, 1,288,230.72 and 354,059.40 is: 530,885.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,149.72 : 1,288,230.72 = 354,059.40 : x
  2. Step 2: Convert to fraction form
    859,149.72/1,288,230.72 = 354,059.40/x
  3. Step 3: Cross multiply
    859,149.72x = 1,288,230.72 × 354,059.40
  4. Step 4: Simplify right side
    859,149.72x = 456,110,195,784.77
  5. Step 5: Solve for x
    x = 456,110,195,784.77/859,149.72
  6. Step 6: Final answer
    x = 530,885.58

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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.