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Finding the Fourth Proportional to 629,822.21, 869,153.90 and 343,342.29

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Solution

The fourth proportional to 629,822.21, 869,153.90 and 343,342.29 is: 473,811.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,822.21 : 869,153.90 = 343,342.29 : x
  2. Step 2: Convert to fraction form
    629,822.21/869,153.90 = 343,342.29/x
  3. Step 3: Cross multiply
    629,822.21x = 869,153.90 × 343,342.29
  4. Step 4: Simplify right side
    629,822.21x = 298,417,291,931.05
  5. Step 5: Solve for x
    x = 298,417,291,931.05/629,822.21
  6. Step 6: Final answer
    x = 473,811.96

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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.