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Finding the Fourth Proportional to 289,679.20, 434,518.80 and 237,191.20

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Solution

The fourth proportional to 289,679.20, 434,518.80 and 237,191.20 is: 355,786.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,679.20 : 434,518.80 = 237,191.20 : x
  2. Step 2: Convert to fraction form
    289,679.20/434,518.80 = 237,191.20/x
  3. Step 3: Cross multiply
    289,679.20x = 434,518.80 × 237,191.20
  4. Step 4: Simplify right side
    289,679.20x = 103,064,035,594.56
  5. Step 5: Solve for x
    x = 103,064,035,594.56/289,679.20
  6. Step 6: Final answer
    x = 355,786.80

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1.5x scale

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.