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Finding the Fourth Proportional to 378,486.20, 567,717 and 153,780.20

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Solution

The fourth proportional to 378,486.20, 567,717 and 153,780.20 is: 230,665.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,486.20 : 567,717 = 153,780.20 : x
  2. Step 2: Convert to fraction form
    378,486.20/567,717 = 153,780.20/x
  3. Step 3: Cross multiply
    378,486.20x = 567,717 × 153,780.20
  4. Step 4: Simplify right side
    378,486.20x = 87,303,633,803.40
  5. Step 5: Solve for x
    x = 87,303,633,803.40/378,486.20
  6. Step 6: Final answer
    x = 230,665.30

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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.