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Finding the Fourth Proportional to 372,455.17, 513,999.80 and 211,317.01

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Solution

The fourth proportional to 372,455.17, 513,999.80 and 211,317.01 is: 291,624.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,455.17 : 513,999.80 = 211,317.01 : x
  2. Step 2: Convert to fraction form
    372,455.17/513,999.80 = 211,317.01/x
  3. Step 3: Cross multiply
    372,455.17x = 513,999.80 × 211,317.01
  4. Step 4: Simplify right side
    372,455.17x = 108,616,900,876.60
  5. Step 5: Solve for x
    x = 108,616,900,876.60/372,455.17
  6. Step 6: Final answer
    x = 291,624.09

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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.