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Finding the Fourth Proportional to 287,000.16, 430,234.60 and 126,991.28

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Solution

The fourth proportional to 287,000.16, 430,234.60 and 126,991.28 is: 190,369.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,000.16 : 430,234.60 = 126,991.28 : x
  2. Step 2: Convert to fraction form
    287,000.16/430,234.60 = 126,991.28/x
  3. Step 3: Cross multiply
    287,000.16x = 430,234.60 × 126,991.28
  4. Step 4: Simplify right side
    287,000.16x = 54,636,042,554.29
  5. Step 5: Solve for x
    x = 54,636,042,554.29/287,000.16
  6. Step 6: Final answer
    x = 190,369.38

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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.