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Finding the Fourth Proportional to 290,810.88, 401,298.72 and 163,505.28

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Solution

The fourth proportional to 290,810.88, 401,298.72 and 163,505.28 is: 225,625.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,810.88 : 401,298.72 = 163,505.28 : x
  2. Step 2: Convert to fraction form
    290,810.88/401,298.72 = 163,505.28/x
  3. Step 3: Cross multiply
    290,810.88x = 401,298.72 × 163,505.28
  4. Step 4: Simplify right side
    290,810.88x = 65,614,459,577.24
  5. Step 5: Solve for x
    x = 65,614,459,577.24/290,810.88
  6. Step 6: Final answer
    x = 225,625.88

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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.