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Finding the Fourth Proportional to 290,030.22, 400,235.68 and 160,961.20

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Solution

The fourth proportional to 290,030.22, 400,235.68 and 160,961.20 is: 222,123.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,030.22 : 400,235.68 = 160,961.20 : x
  2. Step 2: Convert to fraction form
    290,030.22/400,235.68 = 160,961.20/x
  3. Step 3: Cross multiply
    290,030.22x = 400,235.68 × 160,961.20
  4. Step 4: Simplify right side
    290,030.22x = 64,422,415,749.06
  5. Step 5: Solve for x
    x = 64,422,415,749.06/290,030.22
  6. Step 6: Final answer
    x = 222,123.11

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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.