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Finding the Fourth Proportional to 398,938.56, 598,290.72 and 328,643.52

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Solution

The fourth proportional to 398,938.56, 598,290.72 and 328,643.52 is: 492,868.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,938.56 : 598,290.72 = 328,643.52 : x
  2. Step 2: Convert to fraction form
    398,938.56/598,290.72 = 328,643.52/x
  3. Step 3: Cross multiply
    398,938.56x = 598,290.72 × 328,643.52
  4. Step 4: Simplify right side
    398,938.56x = 196,624,368,204.13
  5. Step 5: Solve for x
    x = 196,624,368,204.13/398,938.56
  6. Step 6: Final answer
    x = 492,868.80

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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.