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Finding the Fourth Proportional to 287,169.72, 430,469.19 and 137,234.94

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Solution

The fourth proportional to 287,169.72, 430,469.19 and 137,234.94 is: 205,716.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,169.72 : 430,469.19 = 137,234.94 : x
  2. Step 2: Convert to fraction form
    287,169.72/430,469.19 = 137,234.94/x
  3. Step 3: Cross multiply
    287,169.72x = 430,469.19 × 137,234.94
  4. Step 4: Simplify right side
    287,169.72x = 59,075,413,461.50
  5. Step 5: Solve for x
    x = 59,075,413,461.50/287,169.72
  6. Step 6: Final answer
    x = 205,716.03

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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.