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Finding the Fourth Proportional to 389,664.40, 584,515.80 and 203,040.40

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Solution

The fourth proportional to 389,664.40, 584,515.80 and 203,040.40 is: 304,570.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,664.40 : 584,515.80 = 203,040.40 : x
  2. Step 2: Convert to fraction form
    389,664.40/584,515.80 = 203,040.40/x
  3. Step 3: Cross multiply
    389,664.40x = 584,515.80 × 203,040.40
  4. Step 4: Simplify right side
    389,664.40x = 118,680,321,838.32
  5. Step 5: Solve for x
    x = 118,680,321,838.32/389,664.40
  6. Step 6: Final answer
    x = 304,570.60

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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.