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Finding the Fourth Proportional to 659,319.55, 988,782.49 and 280,238.64

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Solution

The fourth proportional to 659,319.55, 988,782.49 and 280,238.64 is: 420,274.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,319.55 : 988,782.49 = 280,238.64 : x
  2. Step 2: Convert to fraction form
    659,319.55/988,782.49 = 280,238.64/x
  3. Step 3: Cross multiply
    659,319.55x = 988,782.49 × 280,238.64
  4. Step 4: Simplify right side
    659,319.55x = 277,095,056,895.78
  5. Step 5: Solve for x
    x = 277,095,056,895.78/659,319.55
  6. Step 6: Final answer
    x = 420,274.29

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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.