Home / 430,513.16-645,351.05-205,815.38

Finding the Fourth Proportional to 430,513.16, 645,351.05 and 205,815.38

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Solution

The fourth proportional to 430,513.16, 645,351.05 and 205,815.38 is: 308,522.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,513.16 : 645,351.05 = 205,815.38 : x
  2. Step 2: Convert to fraction form
    430,513.16/645,351.05 = 205,815.38/x
  3. Step 3: Cross multiply
    430,513.16x = 645,351.05 × 205,815.38
  4. Step 4: Simplify right side
    430,513.16x = 132,823,168,876.93
  5. Step 5: Solve for x
    x = 132,823,168,876.93/430,513.16
  6. Step 6: Final answer
    x = 308,522.90

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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.