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Finding the Fourth Proportional to 388,647.88, 536,581.70 and 317,198.32

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Solution

The fourth proportional to 388,647.88, 536,581.70 and 317,198.32 is: 437,935.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,647.88 : 536,581.70 = 317,198.32 : x
  2. Step 2: Convert to fraction form
    388,647.88/536,581.70 = 317,198.32/x
  3. Step 3: Cross multiply
    388,647.88x = 536,581.70 × 317,198.32
  4. Step 4: Simplify right side
    388,647.88x = 170,202,813,782.74
  5. Step 5: Solve for x
    x = 170,202,813,782.74/388,647.88
  6. Step 6: Final answer
    x = 437,935.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.