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Finding the Fourth Proportional to 427,404.36, 639,474.32 and 373,699.76

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Solution

The fourth proportional to 427,404.36, 639,474.32 and 373,699.76 is: 559,122.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,404.36 : 639,474.32 = 373,699.76 : x
  2. Step 2: Convert to fraction form
    427,404.36/639,474.32 = 373,699.76/x
  3. Step 3: Cross multiply
    427,404.36x = 639,474.32 × 373,699.76
  4. Step 4: Simplify right side
    427,404.36x = 238,971,399,910.16
  5. Step 5: Solve for x
    x = 238,971,399,910.16/427,404.36
  6. Step 6: Final answer
    x = 559,122.51

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1.5x scale

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.