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Finding the Fourth Proportional to 290,384.92, 435,561.72 and 90,682.39

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Solution

The fourth proportional to 290,384.92, 435,561.72 and 90,682.39 is: 136,018.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,384.92 : 435,561.72 = 90,682.39 : x
  2. Step 2: Convert to fraction form
    290,384.92/435,561.72 = 90,682.39/x
  3. Step 3: Cross multiply
    290,384.92x = 435,561.72 × 90,682.39
  4. Step 4: Simplify right side
    290,384.92x = 39,497,777,762.11
  5. Step 5: Solve for x
    x = 39,497,777,762.11/290,384.92
  6. Step 6: Final answer
    x = 136,018.69

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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.