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Finding the Fourth Proportional to 398,672.79, 598,023.30 and 99,154.94

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Solution

The fourth proportional to 398,672.79, 598,023.30 and 99,154.94 is: 148,735.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,672.79 : 598,023.30 = 99,154.94 : x
  2. Step 2: Convert to fraction form
    398,672.79/598,023.30 = 99,154.94/x
  3. Step 3: Cross multiply
    398,672.79x = 598,023.30 × 99,154.94
  4. Step 4: Simplify right side
    398,672.79x = 59,296,961,811.82
  5. Step 5: Solve for x
    x = 59,296,961,811.82/398,672.79
  6. Step 6: Final answer
    x = 148,735.92

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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.