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Finding the Fourth Proportional to 284,297.78, 392,337.06 and 156,981.44

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Solution

The fourth proportional to 284,297.78, 392,337.06 and 156,981.44 is: 216,637.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,297.78 : 392,337.06 = 156,981.44 : x
  2. Step 2: Convert to fraction form
    284,297.78/392,337.06 = 156,981.44/x
  3. Step 3: Cross multiply
    284,297.78x = 392,337.06 × 156,981.44
  4. Step 4: Simplify right side
    284,297.78x = 61,589,636,644.17
  5. Step 5: Solve for x
    x = 61,589,636,644.17/284,297.78
  6. Step 6: Final answer
    x = 216,637.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.