Home / 430,520.98-645,805.74-131,011.30

Finding the Fourth Proportional to 430,520.98, 645,805.74 and 131,011.30

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Solution

The fourth proportional to 430,520.98, 645,805.74 and 131,011.30 is: 196,524.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,520.98 : 645,805.74 = 131,011.30 : x
  2. Step 2: Convert to fraction form
    430,520.98/645,805.74 = 131,011.30/x
  3. Step 3: Cross multiply
    430,520.98x = 645,805.74 × 131,011.30
  4. Step 4: Simplify right side
    430,520.98x = 84,607,849,544.86
  5. Step 5: Solve for x
    x = 84,607,849,544.86/430,520.98
  6. Step 6: Final answer
    x = 196,524.34

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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.