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Finding the Fourth Proportional to 429,933.60, 644,901.96 and 130,416.80

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Solution

The fourth proportional to 429,933.60, 644,901.96 and 130,416.80 is: 195,625.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,933.60 : 644,901.96 = 130,416.80 : x
  2. Step 2: Convert to fraction form
    429,933.60/644,901.96 = 130,416.80/x
  3. Step 3: Cross multiply
    429,933.60x = 644,901.96 × 130,416.80
  4. Step 4: Simplify right side
    429,933.60x = 84,106,049,936.93
  5. Step 5: Solve for x
    x = 84,106,049,936.93/429,933.60
  6. Step 6: Final answer
    x = 195,625.67

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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.