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Finding the Fourth Proportional to 306,579.60, 459,869.40 and 279,023.40

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Solution

The fourth proportional to 306,579.60, 459,869.40 and 279,023.40 is: 418,535.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,579.60 : 459,869.40 = 279,023.40 : x
  2. Step 2: Convert to fraction form
    306,579.60/459,869.40 = 279,023.40/x
  3. Step 3: Cross multiply
    306,579.60x = 459,869.40 × 279,023.40
  4. Step 4: Simplify right side
    306,579.60x = 128,314,323,543.96
  5. Step 5: Solve for x
    x = 128,314,323,543.96/306,579.60
  6. Step 6: Final answer
    x = 418,535.10

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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.