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Finding the Fourth Proportional to 395,249.16, 545,307.54 and 223,145.64

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Solution

The fourth proportional to 395,249.16, 545,307.54 and 223,145.64 is: 307,864.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,249.16 : 545,307.54 = 223,145.64 : x
  2. Step 2: Convert to fraction form
    395,249.16/545,307.54 = 223,145.64/x
  3. Step 3: Cross multiply
    395,249.16x = 545,307.54 × 223,145.64
  4. Step 4: Simplify right side
    395,249.16x = 121,683,000,010.13
  5. Step 5: Solve for x
    x = 121,683,000,010.13/395,249.16
  6. Step 6: Final answer
    x = 307,864.03

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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.