Home / 648,431.20-973,222.80-381,858.40

Finding the Fourth Proportional to 648,431.20, 973,222.80 and 381,858.40

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Solution

The fourth proportional to 648,431.20, 973,222.80 and 381,858.40 is: 573,126.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,431.20 : 973,222.80 = 381,858.40 : x
  2. Step 2: Convert to fraction form
    648,431.20/973,222.80 = 381,858.40/x
  3. Step 3: Cross multiply
    648,431.20x = 973,222.80 × 381,858.40
  4. Step 4: Simplify right side
    648,431.20x = 371,633,301,251.52
  5. Step 5: Solve for x
    x = 371,633,301,251.52/648,431.20
  6. Step 6: Final answer
    x = 573,126.80

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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.