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Finding the Fourth Proportional to 624,699.90, 862,084.80 and 338,220

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Solution

The fourth proportional to 624,699.90, 862,084.80 and 338,220 is: 466,743.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,699.90 : 862,084.80 = 338,220 : x
  2. Step 2: Convert to fraction form
    624,699.90/862,084.80 = 338,220/x
  3. Step 3: Cross multiply
    624,699.90x = 862,084.80 × 338,220
  4. Step 4: Simplify right side
    624,699.90x = 291,574,321,056
  5. Step 5: Solve for x
    x = 291,574,321,056/624,699.90
  6. Step 6: Final answer
    x = 466,743.03

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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.