Home / 287,221.10-430,190.12-208,153.76

Finding the Fourth Proportional to 287,221.10, 430,190.12 and 208,153.76

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Solution

The fourth proportional to 287,221.10, 430,190.12 and 208,153.76 is: 311,765.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,221.10 : 430,190.12 = 208,153.76 : x
  2. Step 2: Convert to fraction form
    287,221.10/430,190.12 = 208,153.76/x
  3. Step 3: Cross multiply
    287,221.10x = 430,190.12 × 208,153.76
  4. Step 4: Simplify right side
    287,221.10x = 89,545,690,992.85
  5. Step 5: Solve for x
    x = 89,545,690,992.85/287,221.10
  6. Step 6: Final answer
    x = 311,765.71

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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.