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Finding the Fourth Proportional to 388,007.66, 535,445.08 and 218,241.38

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Solution

The fourth proportional to 388,007.66, 535,445.08 and 218,241.38 is: 301,170.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,007.66 : 535,445.08 = 218,241.38 : x
  2. Step 2: Convert to fraction form
    388,007.66/535,445.08 = 218,241.38/x
  3. Step 3: Cross multiply
    388,007.66x = 535,445.08 × 218,241.38
  4. Step 4: Simplify right side
    388,007.66x = 116,856,269,950.58
  5. Step 5: Solve for x
    x = 116,856,269,950.58/388,007.66
  6. Step 6: Final answer
    x = 301,170.01

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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.