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Finding the Fourth Proportional to 287,137.78, 430,706.67 and 76,770.25

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Solution

The fourth proportional to 287,137.78, 430,706.67 and 76,770.25 is: 115,155.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,137.78 : 430,706.67 = 76,770.25 : x
  2. Step 2: Convert to fraction form
    287,137.78/430,706.67 = 76,770.25/x
  3. Step 3: Cross multiply
    287,137.78x = 430,706.67 × 76,770.25
  4. Step 4: Simplify right side
    287,137.78x = 33,065,458,732.57
  5. Step 5: Solve for x
    x = 33,065,458,732.57/287,137.78
  6. Step 6: Final answer
    x = 115,155.38

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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.