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Finding the Fourth Proportional to 289,217.60, 434,344.80 and 210,420.80

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Solution

The fourth proportional to 289,217.60, 434,344.80 and 210,420.80 is: 316,008.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,217.60 : 434,344.80 = 210,420.80 : x
  2. Step 2: Convert to fraction form
    289,217.60/434,344.80 = 210,420.80/x
  3. Step 3: Cross multiply
    289,217.60x = 434,344.80 × 210,420.80
  4. Step 4: Simplify right side
    289,217.60x = 91,395,180,291.84
  5. Step 5: Solve for x
    x = 91,395,180,291.84/289,217.60
  6. Step 6: Final answer
    x = 316,008.36

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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.