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Finding the Fourth Proportional to 492,980.22, 680,333.31 and 311,626.89

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Solution

The fourth proportional to 492,980.22, 680,333.31 and 311,626.89 is: 430,058.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,980.22 : 680,333.31 = 311,626.89 : x
  2. Step 2: Convert to fraction form
    492,980.22/680,333.31 = 311,626.89/x
  3. Step 3: Cross multiply
    492,980.22x = 680,333.31 × 311,626.89
  4. Step 4: Simplify right side
    492,980.22x = 212,010,153,558.71
  5. Step 5: Solve for x
    x = 212,010,153,558.71/492,980.22
  6. Step 6: Final answer
    x = 430,058.13

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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.