Home / 430,680.87-645,972.02-115,162.38

Finding the Fourth Proportional to 430,680.87, 645,972.02 and 115,162.38

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Solution

The fourth proportional to 430,680.87, 645,972.02 and 115,162.38 is: 172,730.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,680.87 : 645,972.02 = 115,162.38 : x
  2. Step 2: Convert to fraction form
    430,680.87/645,972.02 = 115,162.38/x
  3. Step 3: Cross multiply
    430,680.87x = 645,972.02 × 115,162.38
  4. Step 4: Simplify right side
    430,680.87x = 74,391,674,660.80
  5. Step 5: Solve for x
    x = 74,391,674,660.80/430,680.87
  6. Step 6: Final answer
    x = 172,730.39

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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.