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Finding the Fourth Proportional to 290,812.55, 401,317.40 and 163,488.11

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Solution

The fourth proportional to 290,812.55, 401,317.40 and 163,488.11 is: 225,611.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,812.55 : 401,317.40 = 163,488.11 : x
  2. Step 2: Convert to fraction form
    290,812.55/401,317.40 = 163,488.11/x
  3. Step 3: Cross multiply
    290,812.55x = 401,317.40 × 163,488.11
  4. Step 4: Simplify right side
    290,812.55x = 65,610,621,638.25
  5. Step 5: Solve for x
    x = 65,610,621,638.25/290,812.55
  6. Step 6: Final answer
    x = 225,611.39

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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.