Home / 430,024.85-645,061.87-130,515.20

Finding the Fourth Proportional to 430,024.85, 645,061.87 and 130,515.20

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Solution

The fourth proportional to 430,024.85, 645,061.87 and 130,515.20 is: 195,780.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,024.85 : 645,061.87 = 130,515.20 : x
  2. Step 2: Convert to fraction form
    430,024.85/645,061.87 = 130,515.20/x
  3. Step 3: Cross multiply
    430,024.85x = 645,061.87 × 130,515.20
  4. Step 4: Simplify right side
    430,024.85x = 84,190,375,750.11
  5. Step 5: Solve for x
    x = 84,190,375,750.11/430,024.85
  6. Step 6: Final answer
    x = 195,780.26

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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.