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Finding the Fourth Proportional to 388,405.56, 535,692.78 and 254,243.64

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Solution

The fourth proportional to 388,405.56, 535,692.78 and 254,243.64 is: 350,655.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,405.56 : 535,692.78 = 254,243.64 : x
  2. Step 2: Convert to fraction form
    388,405.56/535,692.78 = 254,243.64/x
  3. Step 3: Cross multiply
    388,405.56x = 535,692.78 × 254,243.64
  4. Step 4: Simplify right side
    388,405.56x = 136,196,482,308.92
  5. Step 5: Solve for x
    x = 136,196,482,308.92/388,405.56
  6. Step 6: Final answer
    x = 350,655.34

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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.