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Finding the Fourth Proportional to 309,392.25, 426,162.68 and 218,590.59

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Solution

The fourth proportional to 309,392.25, 426,162.68 and 218,590.59 is: 301,090.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,392.25 : 426,162.68 = 218,590.59 : x
  2. Step 2: Convert to fraction form
    309,392.25/426,162.68 = 218,590.59/x
  3. Step 3: Cross multiply
    309,392.25x = 426,162.68 × 218,590.59
  4. Step 4: Simplify right side
    309,392.25x = 93,155,149,526.37
  5. Step 5: Solve for x
    x = 93,155,149,526.37/309,392.25
  6. Step 6: Final answer
    x = 301,090.77

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1.5x scale

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.