Home / 420,929.78-580,875.80-229,938.26

Finding the Fourth Proportional to 420,929.78, 580,875.80 and 229,938.26

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Solution

The fourth proportional to 420,929.78, 580,875.80 and 229,938.26 is: 317,310.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,929.78 : 580,875.80 = 229,938.26 : x
  2. Step 2: Convert to fraction form
    420,929.78/580,875.80 = 229,938.26/x
  3. Step 3: Cross multiply
    420,929.78x = 580,875.80 × 229,938.26
  4. Step 4: Simplify right side
    420,929.78x = 133,565,570,728.11
  5. Step 5: Solve for x
    x = 133,565,570,728.11/420,929.78
  6. Step 6: Final answer
    x = 317,310.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.