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Finding the Fourth Proportional to 561,663.90, 842,605.20 and 162,317.70

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Solution

The fourth proportional to 561,663.90, 842,605.20 and 162,317.70 is: 243,508.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,663.90 : 842,605.20 = 162,317.70 : x
  2. Step 2: Convert to fraction form
    561,663.90/842,605.20 = 162,317.70/x
  3. Step 3: Cross multiply
    561,663.90x = 842,605.20 × 162,317.70
  4. Step 4: Simplify right side
    561,663.90x = 136,769,738,072.04
  5. Step 5: Solve for x
    x = 136,769,738,072.04/561,663.90
  6. Step 6: Final answer
    x = 243,508.15

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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.