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Finding the Fourth Proportional to 388,240.80, 535,770.36 and 218,476.20

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Solution

The fourth proportional to 388,240.80, 535,770.36 and 218,476.20 is: 301,496.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,240.80 : 535,770.36 = 218,476.20 : x
  2. Step 2: Convert to fraction form
    388,240.80/535,770.36 = 218,476.20/x
  3. Step 3: Cross multiply
    388,240.80x = 535,770.36 × 218,476.20
  4. Step 4: Simplify right side
    388,240.80x = 117,053,072,325.43
  5. Step 5: Solve for x
    x = 117,053,072,325.43/388,240.80
  6. Step 6: Final answer
    x = 301,496.06

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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.