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Finding the Fourth Proportional to 370,620.80, 555,931.20 and 133,971.20

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Solution

The fourth proportional to 370,620.80, 555,931.20 and 133,971.20 is: 200,956.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,620.80 : 555,931.20 = 133,971.20 : x
  2. Step 2: Convert to fraction form
    370,620.80/555,931.20 = 133,971.20/x
  3. Step 3: Cross multiply
    370,620.80x = 555,931.20 × 133,971.20
  4. Step 4: Simplify right side
    370,620.80x = 74,478,769,981.44
  5. Step 5: Solve for x
    x = 74,478,769,981.44/370,620.80
  6. Step 6: Final answer
    x = 200,956.80

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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.