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Finding the Fourth Proportional to 353,086.68, 529,463.64 and 128,289

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Solution

The fourth proportional to 353,086.68, 529,463.64 and 128,289 is: 192,373.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,086.68 : 529,463.64 = 128,289 : x
  2. Step 2: Convert to fraction form
    353,086.68/529,463.64 = 128,289/x
  3. Step 3: Cross multiply
    353,086.68x = 529,463.64 × 128,289
  4. Step 4: Simplify right side
    353,086.68x = 67,924,360,911.96
  5. Step 5: Solve for x
    x = 67,924,360,911.96/353,086.68
  6. Step 6: Final answer
    x = 192,373.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.