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Finding the Fourth Proportional to 629,715.63, 869,007.82 and 357,783.88

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Solution

The fourth proportional to 629,715.63, 869,007.82 and 357,783.88 is: 493,741.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,715.63 : 869,007.82 = 357,783.88 : x
  2. Step 2: Convert to fraction form
    629,715.63/869,007.82 = 357,783.88/x
  3. Step 3: Cross multiply
    629,715.63x = 869,007.82 × 357,783.88
  4. Step 4: Simplify right side
    629,715.63x = 310,916,989,781.74
  5. Step 5: Solve for x
    x = 310,916,989,781.74/629,715.63
  6. Step 6: Final answer
    x = 493,741.90

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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.