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Finding the Fourth Proportional to 383,820.80, 575,731.20 and 134,470.40

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Solution

The fourth proportional to 383,820.80, 575,731.20 and 134,470.40 is: 201,705.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,820.80 : 575,731.20 = 134,470.40 : x
  2. Step 2: Convert to fraction form
    383,820.80/575,731.20 = 134,470.40/x
  3. Step 3: Cross multiply
    383,820.80x = 575,731.20 × 134,470.40
  4. Step 4: Simplify right side
    383,820.80x = 77,418,804,756.48
  5. Step 5: Solve for x
    x = 77,418,804,756.48/383,820.80
  6. Step 6: Final answer
    x = 201,705.60

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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.