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Finding the Fourth Proportional to 640,115.53, 960,431.49 and 284,886.59

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Solution

The fourth proportional to 640,115.53, 960,431.49 and 284,886.59 is: 427,444.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,115.53 : 960,431.49 = 284,886.59 : x
  2. Step 2: Convert to fraction form
    640,115.53/960,431.49 = 284,886.59/x
  3. Step 3: Cross multiply
    640,115.53x = 960,431.49 × 284,886.59
  4. Step 4: Simplify right side
    640,115.53x = 273,614,052,114.72
  5. Step 5: Solve for x
    x = 273,614,052,114.72/640,115.53
  6. Step 6: Final answer
    x = 427,444.80

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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.