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Finding the Fourth Proportional to 210,857.60, 290,987.69 and 115,366.34

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Solution

The fourth proportional to 210,857.60, 290,987.69 and 115,366.34 is: 159,207.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,857.60 : 290,987.69 = 115,366.34 : x
  2. Step 2: Convert to fraction form
    210,857.60/290,987.69 = 115,366.34/x
  3. Step 3: Cross multiply
    210,857.60x = 290,987.69 × 115,366.34
  4. Step 4: Simplify right side
    210,857.60x = 33,570,182,748.58
  5. Step 5: Solve for x
    x = 33,570,182,748.58/210,857.60
  6. Step 6: Final answer
    x = 159,207.84

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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.