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Finding the Fourth Proportional to 629,720.70, 869,014.80 and 357,788.94

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Solution

The fourth proportional to 629,720.70, 869,014.80 and 357,788.94 is: 493,748.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,720.70 : 869,014.80 = 357,788.94 : x
  2. Step 2: Convert to fraction form
    629,720.70/869,014.80 = 357,788.94/x
  3. Step 3: Cross multiply
    629,720.70x = 869,014.80 × 357,788.94
  4. Step 4: Simplify right side
    629,720.70x = 310,923,884,136.31
  5. Step 5: Solve for x
    x = 310,923,884,136.31/629,720.70
  6. Step 6: Final answer
    x = 493,748.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.