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Finding the Fourth Proportional to 259,015.20, 388,522.80 and 109,424.40

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Solution

The fourth proportional to 259,015.20, 388,522.80 and 109,424.40 is: 164,136.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,015.20 : 388,522.80 = 109,424.40 : x
  2. Step 2: Convert to fraction form
    259,015.20/388,522.80 = 109,424.40/x
  3. Step 3: Cross multiply
    259,015.20x = 388,522.80 × 109,424.40
  4. Step 4: Simplify right side
    259,015.20x = 42,513,874,276.32
  5. Step 5: Solve for x
    x = 42,513,874,276.32/259,015.20
  6. Step 6: Final answer
    x = 164,136.60

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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.