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Finding the Fourth Proportional to 290,321.19, 435,312.27 and 112,620.54

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Solution

The fourth proportional to 290,321.19, 435,312.27 and 112,620.54 is: 168,865.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,321.19 : 435,312.27 = 112,620.54 : x
  2. Step 2: Convert to fraction form
    290,321.19/435,312.27 = 112,620.54/x
  3. Step 3: Cross multiply
    290,321.19x = 435,312.27 × 112,620.54
  4. Step 4: Simplify right side
    290,321.19x = 49,025,102,916.03
  5. Step 5: Solve for x
    x = 49,025,102,916.03/290,321.19
  6. Step 6: Final answer
    x = 168,865.05

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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.