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Finding the Fourth Proportional to 210,808.96, 290,910.16 and 115,313.60

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Solution

The fourth proportional to 210,808.96, 290,910.16 and 115,313.60 is: 159,129.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,808.96 : 290,910.16 = 115,313.60 : x
  2. Step 2: Convert to fraction form
    210,808.96/290,910.16 = 115,313.60/x
  3. Step 3: Cross multiply
    210,808.96x = 290,910.16 × 115,313.60
  4. Step 4: Simplify right side
    210,808.96x = 33,545,897,826.18
  5. Step 5: Solve for x
    x = 33,545,897,826.18/210,808.96
  6. Step 6: Final answer
    x = 159,129.37

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1.5x scale

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.