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Finding the Fourth Proportional to 388,068.96, 535,534.32 and 218,303.09

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Solution

The fourth proportional to 388,068.96, 535,534.32 and 218,303.09 is: 301,257.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,068.96 : 535,534.32 = 218,303.09 : x
  2. Step 2: Convert to fraction form
    388,068.96/535,534.32 = 218,303.09/x
  3. Step 3: Cross multiply
    388,068.96x = 535,534.32 × 218,303.09
  4. Step 4: Simplify right side
    388,068.96x = 116,908,794,179.38
  5. Step 5: Solve for x
    x = 116,908,794,179.38/388,068.96
  6. Step 6: Final answer
    x = 301,257.78

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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.