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Finding the Fourth Proportional to 210,777.45, 290,879.84 and 115,284.15

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Solution

The fourth proportional to 210,777.45, 290,879.84 and 115,284.15 is: 159,095.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,777.45 : 290,879.84 = 115,284.15 : x
  2. Step 2: Convert to fraction form
    210,777.45/290,879.84 = 115,284.15/x
  3. Step 3: Cross multiply
    210,777.45x = 290,879.84 × 115,284.15
  4. Step 4: Simplify right side
    210,777.45x = 33,533,834,530.12
  5. Step 5: Solve for x
    x = 33,533,834,530.12/210,777.45
  6. Step 6: Final answer
    x = 159,095.93

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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.