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Finding the Fourth Proportional to 383,911.20, 575,866.80 and 378,006.30

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Solution

The fourth proportional to 383,911.20, 575,866.80 and 378,006.30 is: 567,009.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,911.20 : 575,866.80 = 378,006.30 : x
  2. Step 2: Convert to fraction form
    383,911.20/575,866.80 = 378,006.30/x
  3. Step 3: Cross multiply
    383,911.20x = 575,866.80 × 378,006.30
  4. Step 4: Simplify right side
    383,911.20x = 217,681,278,360.84
  5. Step 5: Solve for x
    x = 217,681,278,360.84/383,911.20
  6. Step 6: Final answer
    x = 567,009.45

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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.