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Finding the Fourth Proportional to 259,920.40, 389,880.60 and 112,176.40

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Solution

The fourth proportional to 259,920.40, 389,880.60 and 112,176.40 is: 168,264.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,920.40 : 389,880.60 = 112,176.40 : x
  2. Step 2: Convert to fraction form
    259,920.40/389,880.60 = 112,176.40/x
  3. Step 3: Cross multiply
    259,920.40x = 389,880.60 × 112,176.40
  4. Step 4: Simplify right side
    259,920.40x = 43,735,402,137.84
  5. Step 5: Solve for x
    x = 43,735,402,137.84/259,920.40
  6. Step 6: Final answer
    x = 168,264.60

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1.5x scale

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.