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Finding the Fourth Proportional to 648,431.70, 973,223.55 and 381,858.90

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Solution

The fourth proportional to 648,431.70, 973,223.55 and 381,858.90 is: 573,127.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,431.70 : 973,223.55 = 381,858.90 : x
  2. Step 2: Convert to fraction form
    648,431.70/973,223.55 = 381,858.90/x
  3. Step 3: Cross multiply
    648,431.70x = 973,223.55 × 381,858.90
  4. Step 4: Simplify right side
    648,431.70x = 371,634,074,257.10
  5. Step 5: Solve for x
    x = 371,634,074,257.10/648,431.70
  6. Step 6: Final answer
    x = 573,127.55

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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.