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Finding the Fourth Proportional to 306,645.60, 459,968.40 and 279,089.40

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Solution

The fourth proportional to 306,645.60, 459,968.40 and 279,089.40 is: 418,634.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,645.60 : 459,968.40 = 279,089.40 : x
  2. Step 2: Convert to fraction form
    306,645.60/459,968.40 = 279,089.40/x
  3. Step 3: Cross multiply
    306,645.60x = 459,968.40 × 279,089.40
  4. Step 4: Simplify right side
    306,645.60x = 128,372,304,774.96
  5. Step 5: Solve for x
    x = 128,372,304,774.96/306,645.60
  6. Step 6: Final answer
    x = 418,634.10

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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.