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Finding the Fourth Proportional to 388,038.48, 535,449.60 and 218,268.96

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Solution

The fourth proportional to 388,038.48, 535,449.60 and 218,268.96 is: 301,186.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,038.48 : 535,449.60 = 218,268.96 : x
  2. Step 2: Convert to fraction form
    388,038.48/535,449.60 = 218,268.96/x
  3. Step 3: Cross multiply
    388,038.48x = 535,449.60 × 218,268.96
  4. Step 4: Simplify right side
    388,038.48x = 116,872,027,324.42
  5. Step 5: Solve for x
    x = 116,872,027,324.42/388,038.48
  6. Step 6: Final answer
    x = 301,186.70

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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.