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Finding the Fourth Proportional to 388,281.45, 535,827.30 and 218,515.58

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Solution

The fourth proportional to 388,281.45, 535,827.30 and 218,515.58 is: 301,550.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,281.45 : 535,827.30 = 218,515.58 : x
  2. Step 2: Convert to fraction form
    388,281.45/535,827.30 = 218,515.58/x
  3. Step 3: Cross multiply
    388,281.45x = 535,827.30 × 218,515.58
  4. Step 4: Simplify right side
    388,281.45x = 117,086,613,239.33
  5. Step 5: Solve for x
    x = 117,086,613,239.33/388,281.45
  6. Step 6: Final answer
    x = 301,550.88

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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.