Home / 420,915.18-580,875.67-229,940.87

Finding the Fourth Proportional to 420,915.18, 580,875.67 and 229,940.87

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Solution

The fourth proportional to 420,915.18, 580,875.67 and 229,940.87 is: 317,325.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,915.18 : 580,875.67 = 229,940.87 : x
  2. Step 2: Convert to fraction form
    420,915.18/580,875.67 = 229,940.87/x
  3. Step 3: Cross multiply
    420,915.18x = 580,875.67 × 229,940.87
  4. Step 4: Simplify right side
    420,915.18x = 133,567,056,921.63
  5. Step 5: Solve for x
    x = 133,567,056,921.63/420,915.18
  6. Step 6: Final answer
    x = 317,325.35

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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.