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Finding the Fourth Proportional to 210,783.60, 290,881.44 and 115,299.12

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Solution

The fourth proportional to 210,783.60, 290,881.44 and 115,299.12 is: 159,112.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,783.60 : 290,881.44 = 115,299.12 : x
  2. Step 2: Convert to fraction form
    210,783.60/290,881.44 = 115,299.12/x
  3. Step 3: Cross multiply
    210,783.60x = 290,881.44 × 115,299.12
  4. Step 4: Simplify right side
    210,783.60x = 33,538,374,056.33
  5. Step 5: Solve for x
    x = 33,538,374,056.33/210,783.60
  6. Step 6: Final answer
    x = 159,112.82

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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.