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Finding the Fourth Proportional to 287,297.70, 430,946.55 and 187,764.90

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Solution

The fourth proportional to 287,297.70, 430,946.55 and 187,764.90 is: 281,647.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,297.70 : 430,946.55 = 187,764.90 : x
  2. Step 2: Convert to fraction form
    287,297.70/430,946.55 = 187,764.90/x
  3. Step 3: Cross multiply
    287,297.70x = 430,946.55 × 187,764.90
  4. Step 4: Simplify right side
    287,297.70x = 80,916,635,866.10
  5. Step 5: Solve for x
    x = 80,916,635,866.10/287,297.70
  6. Step 6: Final answer
    x = 281,647.35

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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.