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Finding the Fourth Proportional to 290,321.93, 435,313.40 and 112,621.29

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Solution

The fourth proportional to 290,321.93, 435,313.40 and 112,621.29 is: 168,866.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,321.93 : 435,313.40 = 112,621.29 : x
  2. Step 2: Convert to fraction form
    290,321.93/435,313.40 = 112,621.29/x
  3. Step 3: Cross multiply
    290,321.93x = 435,313.40 × 112,621.29
  4. Step 4: Simplify right side
    290,321.93x = 49,025,556,099.18
  5. Step 5: Solve for x
    x = 49,025,556,099.18/290,321.93
  6. Step 6: Final answer
    x = 168,866.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.