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Finding the Fourth Proportional to 395,031.35, 545,142.90 and 222,985.53

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Solution

The fourth proportional to 395,031.35, 545,142.90 and 222,985.53 is: 307,719.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,031.35 : 545,142.90 = 222,985.53 : x
  2. Step 2: Convert to fraction form
    395,031.35/545,142.90 = 222,985.53/x
  3. Step 3: Cross multiply
    395,031.35x = 545,142.90 × 222,985.53
  4. Step 4: Simplify right side
    395,031.35x = 121,558,978,482.24
  5. Step 5: Solve for x
    x = 121,558,978,482.24/395,031.35
  6. Step 6: Final answer
    x = 307,719.83

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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.