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Finding the Fourth Proportional to 387,773.55, 535,127.46 and 218,008.89

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Solution

The fourth proportional to 387,773.55, 535,127.46 and 218,008.89 is: 300,852.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,773.55 : 535,127.46 = 218,008.89 : x
  2. Step 2: Convert to fraction form
    387,773.55/535,127.46 = 218,008.89/x
  3. Step 3: Cross multiply
    387,773.55x = 535,127.46 × 218,008.89
  4. Step 4: Simplify right side
    387,773.55x = 116,662,543,563.12
  5. Step 5: Solve for x
    x = 116,662,543,563.12/387,773.55
  6. Step 6: Final answer
    x = 300,852.25

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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.