Home / 388,004.18-535,463.28-218,238.30

Finding the Fourth Proportional to 388,004.18, 535,463.28 and 218,238.30

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Solution

The fourth proportional to 388,004.18, 535,463.28 and 218,238.30 is: 301,178.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,004.18 : 535,463.28 = 218,238.30 : x
  2. Step 2: Convert to fraction form
    388,004.18/535,463.28 = 218,238.30/x
  3. Step 3: Cross multiply
    388,004.18x = 535,463.28 × 218,238.30
  4. Step 4: Simplify right side
    388,004.18x = 116,858,595,939.62
  5. Step 5: Solve for x
    x = 116,858,595,939.62/388,004.18
  6. Step 6: Final answer
    x = 301,178.71

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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.