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Finding the Fourth Proportional to 409,898.70, 610,726.76 and 386,980.35

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Solution

The fourth proportional to 409,898.70, 610,726.76 and 386,980.35 is: 576,579.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,898.70 : 610,726.76 = 386,980.35 : x
  2. Step 2: Convert to fraction form
    409,898.70/610,726.76 = 386,980.35/x
  3. Step 3: Cross multiply
    409,898.70x = 610,726.76 × 386,980.35
  4. Step 4: Simplify right side
    409,898.70x = 236,339,253,404.26
  5. Step 5: Solve for x
    x = 236,339,253,404.26/409,898.70
  6. Step 6: Final answer
    x = 576,579.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.