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Finding the Fourth Proportional to 1,559,985.57, 2,339,978.39 and 422,747.72

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Solution

The fourth proportional to 1,559,985.57, 2,339,978.39 and 422,747.72 is: 634,121.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,559,985.57 : 2,339,978.39 = 422,747.72 : x
  2. Step 2: Convert to fraction form
    1,559,985.57/2,339,978.39 = 422,747.72/x
  3. Step 3: Cross multiply
    1,559,985.57x = 2,339,978.39 × 422,747.72
  4. Step 4: Simplify right side
    1,559,985.57x = 989,220,529,221.77
  5. Step 5: Solve for x
    x = 989,220,529,221.77/1,559,985.57
  6. Step 6: Final answer
    x = 634,121.59

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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.