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Finding the Fourth Proportional to 551,441.75, 761,060.99 and 309,724.32

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Solution

The fourth proportional to 551,441.75, 761,060.99 and 309,724.32 is: 427,459.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,441.75 : 761,060.99 = 309,724.32 : x
  2. Step 2: Convert to fraction form
    551,441.75/761,060.99 = 309,724.32/x
  3. Step 3: Cross multiply
    551,441.75x = 761,060.99 × 309,724.32
  4. Step 4: Simplify right side
    551,441.75x = 235,719,096,057.66
  5. Step 5: Solve for x
    x = 235,719,096,057.66/551,441.75
  6. Step 6: Final answer
    x = 427,459.65

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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.