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Finding the Fourth Proportional to 290,866.48, 401,261 and 170,012.84

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Solution

The fourth proportional to 290,866.48, 401,261 and 170,012.84 is: 234,538.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,866.48 : 401,261 = 170,012.84 : x
  2. Step 2: Convert to fraction form
    290,866.48/401,261 = 170,012.84/x
  3. Step 3: Cross multiply
    290,866.48x = 401,261 × 170,012.84
  4. Step 4: Simplify right side
    290,866.48x = 68,219,522,191.24
  5. Step 5: Solve for x
    x = 68,219,522,191.24/290,866.48
  6. Step 6: Final answer
    x = 234,538.96

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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.