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Finding the Fourth Proportional to 399,338.60, 599,007.90 and 162,559.40

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Solution

The fourth proportional to 399,338.60, 599,007.90 and 162,559.40 is: 243,839.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,338.60 : 599,007.90 = 162,559.40 : x
  2. Step 2: Convert to fraction form
    399,338.60/599,007.90 = 162,559.40/x
  3. Step 3: Cross multiply
    399,338.60x = 599,007.90 × 162,559.40
  4. Step 4: Simplify right side
    399,338.60x = 97,374,364,819.26
  5. Step 5: Solve for x
    x = 97,374,364,819.26/399,338.60
  6. Step 6: Final answer
    x = 243,839.10

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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.