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Finding the Fourth Proportional to 430,357.35, 645,420.69 and 130,757.48

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Solution

The fourth proportional to 430,357.35, 645,420.69 and 130,757.48 is: 196,101.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,357.35 : 645,420.69 = 130,757.48 : x
  2. Step 2: Convert to fraction form
    430,357.35/645,420.69 = 130,757.48/x
  3. Step 3: Cross multiply
    430,357.35x = 645,420.69 × 130,757.48
  4. Step 4: Simplify right side
    430,357.35x = 84,393,584,010.98
  5. Step 5: Solve for x
    x = 84,393,584,010.98/430,357.35
  6. Step 6: Final answer
    x = 196,101.18

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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.