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Finding the Fourth Proportional to 668,855.79, 1,003,611.74 and 313,898.67

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Solution

The fourth proportional to 668,855.79, 1,003,611.74 and 313,898.67 is: 471,001.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,855.79 : 1,003,611.74 = 313,898.67 : x
  2. Step 2: Convert to fraction form
    668,855.79/1,003,611.74 = 313,898.67/x
  3. Step 3: Cross multiply
    668,855.79x = 1,003,611.74 × 313,898.67
  4. Step 4: Simplify right side
    668,855.79x = 315,032,388,812.89
  5. Step 5: Solve for x
    x = 315,032,388,812.89/668,855.79
  6. Step 6: Final answer
    x = 471,001.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.