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Finding the Fourth Proportional to 395,643.55, 545,987.37 and 214,360.11

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Solution

The fourth proportional to 395,643.55, 545,987.37 and 214,360.11 is: 295,816.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,643.55 : 545,987.37 = 214,360.11 : x
  2. Step 2: Convert to fraction form
    395,643.55/545,987.37 = 214,360.11/x
  3. Step 3: Cross multiply
    395,643.55x = 545,987.37 × 214,360.11
  4. Step 4: Simplify right side
    395,643.55x = 117,037,912,691.81
  5. Step 5: Solve for x
    x = 117,037,912,691.81/395,643.55
  6. Step 6: Final answer
    x = 295,816.56

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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.