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Finding the Fourth Proportional to 551,231.36, 760,689.60 and 309,515.84

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Solution

The fourth proportional to 551,231.36, 760,689.60 and 309,515.84 is: 427,126.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,231.36 : 760,689.60 = 309,515.84 : x
  2. Step 2: Convert to fraction form
    551,231.36/760,689.60 = 309,515.84/x
  3. Step 3: Cross multiply
    551,231.36x = 760,689.60 × 309,515.84
  4. Step 4: Simplify right side
    551,231.36x = 235,445,480,523.26
  5. Step 5: Solve for x
    x = 235,445,480,523.26/551,231.36
  6. Step 6: Final answer
    x = 427,126.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.