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Finding the Fourth Proportional to 290,377.10, 435,550.16 and 90,674.64

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Solution

The fourth proportional to 290,377.10, 435,550.16 and 90,674.64 is: 136,007.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,377.10 : 435,550.16 = 90,674.64 : x
  2. Step 2: Convert to fraction form
    290,377.10/435,550.16 = 90,674.64/x
  3. Step 3: Cross multiply
    290,377.10x = 435,550.16 × 90,674.64
  4. Step 4: Simplify right side
    290,377.10x = 39,493,354,186.63
  5. Step 5: Solve for x
    x = 39,493,354,186.63/290,377.10
  6. Step 6: Final answer
    x = 136,007.12

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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.