Home / 430,310.78-644,875.68-272,256.29

Finding the Fourth Proportional to 430,310.78, 644,875.68 and 272,256.29

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Solution

The fourth proportional to 430,310.78, 644,875.68 and 272,256.29 is: 408,010.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,310.78 : 644,875.68 = 272,256.29 : x
  2. Step 2: Convert to fraction form
    430,310.78/644,875.68 = 272,256.29/x
  3. Step 3: Cross multiply
    430,310.78x = 644,875.68 × 272,256.29
  4. Step 4: Simplify right side
    430,310.78x = 175,571,458,831.45
  5. Step 5: Solve for x
    x = 175,571,458,831.45/430,310.78
  6. Step 6: Final answer
    x = 408,010.83

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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.