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Finding the Fourth Proportional to 394,867.40, 592,300.64 and 128,627.48

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Solution

The fourth proportional to 394,867.40, 592,300.64 and 128,627.48 is: 192,941.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,867.40 : 592,300.64 = 128,627.48 : x
  2. Step 2: Convert to fraction form
    394,867.40/592,300.64 = 128,627.48/x
  3. Step 3: Cross multiply
    394,867.40x = 592,300.64 × 128,627.48
  4. Step 4: Simplify right side
    394,867.40x = 76,186,140,527.91
  5. Step 5: Solve for x
    x = 76,186,140,527.91/394,867.40
  6. Step 6: Final answer
    x = 192,941.08

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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.