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Finding the Fourth Proportional to 297,009.70, 445,514.55 and 86,620.30

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Solution

The fourth proportional to 297,009.70, 445,514.55 and 86,620.30 is: 129,930.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,009.70 : 445,514.55 = 86,620.30 : x
  2. Step 2: Convert to fraction form
    297,009.70/445,514.55 = 86,620.30/x
  3. Step 3: Cross multiply
    297,009.70x = 445,514.55 × 86,620.30
  4. Step 4: Simplify right side
    297,009.70x = 38,590,603,975.37
  5. Step 5: Solve for x
    x = 38,590,603,975.37/297,009.70
  6. Step 6: Final answer
    x = 129,930.45

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1.5x scale

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.