Home / 430,514.16-645,352.55-205,816.38

Finding the Fourth Proportional to 430,514.16, 645,352.55 and 205,816.38

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Solution

The fourth proportional to 430,514.16, 645,352.55 and 205,816.38 is: 308,524.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,514.16 : 645,352.55 = 205,816.38 : x
  2. Step 2: Convert to fraction form
    430,514.16/645,352.55 = 205,816.38/x
  3. Step 3: Cross multiply
    430,514.16x = 645,352.55 × 205,816.38
  4. Step 4: Simplify right side
    430,514.16x = 132,824,125,664.77
  5. Step 5: Solve for x
    x = 132,824,125,664.77/430,514.16
  6. Step 6: Final answer
    x = 308,524.41

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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.