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Finding the Fourth Proportional to 514,790.21, 771,726.05 and 261,929.27

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Solution

The fourth proportional to 514,790.21, 771,726.05 and 261,929.27 is: 392,660.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    514,790.21 : 771,726.05 = 261,929.27 : x
  2. Step 2: Convert to fraction form
    514,790.21/771,726.05 = 261,929.27/x
  3. Step 3: Cross multiply
    514,790.21x = 771,726.05 × 261,929.27
  4. Step 4: Simplify right side
    514,790.21x = 202,137,635,748.21
  5. Step 5: Solve for x
    x = 202,137,635,748.21/514,790.21
  6. Step 6: Final answer
    x = 392,660.22

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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.