Home / 388,144.12-535,633.40-218,377.84

Finding the Fourth Proportional to 388,144.12, 535,633.40 and 218,377.84

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Solution

The fourth proportional to 388,144.12, 535,633.40 and 218,377.84 is: 301,358.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,144.12 : 535,633.40 = 218,377.84 : x
  2. Step 2: Convert to fraction form
    388,144.12/535,633.40 = 218,377.84/x
  3. Step 3: Cross multiply
    388,144.12x = 535,633.40 × 218,377.84
  4. Step 4: Simplify right side
    388,144.12x = 116,970,464,923.86
  5. Step 5: Solve for x
    x = 116,970,464,923.86/388,144.12
  6. Step 6: Final answer
    x = 301,358.33

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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.