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Finding the Fourth Proportional to 678,942.60, 936,956.42 and 373,038.06

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Solution

The fourth proportional to 678,942.60, 936,956.42 and 373,038.06 is: 514,801.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,942.60 : 936,956.42 = 373,038.06 : x
  2. Step 2: Convert to fraction form
    678,942.60/936,956.42 = 373,038.06/x
  3. Step 3: Cross multiply
    678,942.60x = 936,956.42 × 373,038.06
  4. Step 4: Simplify right side
    678,942.60x = 349,520,405,221.35
  5. Step 5: Solve for x
    x = 349,520,405,221.35/678,942.60
  6. Step 6: Final answer
    x = 514,801.11

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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.