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Finding the Fourth Proportional to 630,361.70, 869,901.18 and 343,887.78

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Solution

The fourth proportional to 630,361.70, 869,901.18 and 343,887.78 is: 474,566.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,361.70 : 869,901.18 = 343,887.78 : x
  2. Step 2: Convert to fraction form
    630,361.70/869,901.18 = 343,887.78/x
  3. Step 3: Cross multiply
    630,361.70x = 869,901.18 × 343,887.78
  4. Step 4: Simplify right side
    630,361.70x = 299,148,385,609.58
  5. Step 5: Solve for x
    x = 299,148,385,609.58/630,361.70
  6. Step 6: Final answer
    x = 474,566.25

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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.