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Finding the Fourth Proportional to 389,920.40, 584,880.60 and 238,361.30

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Solution

The fourth proportional to 389,920.40, 584,880.60 and 238,361.30 is: 357,541.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,920.40 : 584,880.60 = 238,361.30 : x
  2. Step 2: Convert to fraction form
    389,920.40/584,880.60 = 238,361.30/x
  3. Step 3: Cross multiply
    389,920.40x = 584,880.60 × 238,361.30
  4. Step 4: Simplify right side
    389,920.40x = 139,412,900,160.78
  5. Step 5: Solve for x
    x = 139,412,900,160.78/389,920.40
  6. Step 6: Final answer
    x = 357,541.95

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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.