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Finding the Fourth Proportional to 439,878.30, 659,817.45 and 400,512.30

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Solution

The fourth proportional to 439,878.30, 659,817.45 and 400,512.30 is: 600,768.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,878.30 : 659,817.45 = 400,512.30 : x
  2. Step 2: Convert to fraction form
    439,878.30/659,817.45 = 400,512.30/x
  3. Step 3: Cross multiply
    439,878.30x = 659,817.45 × 400,512.30
  4. Step 4: Simplify right side
    439,878.30x = 264,265,004,479.64
  5. Step 5: Solve for x
    x = 264,265,004,479.64/439,878.30
  6. Step 6: Final answer
    x = 600,768.45

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Similar ratio
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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.