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Finding the Fourth Proportional to 287,045.45, 430,664.97 and 127,099.55

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Solution

The fourth proportional to 287,045.45, 430,664.97 and 127,099.55 is: 190,692.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,045.45 : 430,664.97 = 127,099.55 : x
  2. Step 2: Convert to fraction form
    287,045.45/430,664.97 = 127,099.55/x
  3. Step 3: Cross multiply
    287,045.45x = 430,664.97 × 127,099.55
  4. Step 4: Simplify right side
    287,045.45x = 54,737,321,098.94
  5. Step 5: Solve for x
    x = 54,737,321,098.94/287,045.45
  6. Step 6: Final answer
    x = 190,692.17

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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.