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Finding the Fourth Proportional to 339,602.40, 509,403.60 and 302,860.80

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Solution

The fourth proportional to 339,602.40, 509,403.60 and 302,860.80 is: 454,291.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,602.40 : 509,403.60 = 302,860.80 : x
  2. Step 2: Convert to fraction form
    339,602.40/509,403.60 = 302,860.80/x
  3. Step 3: Cross multiply
    339,602.40x = 509,403.60 × 302,860.80
  4. Step 4: Simplify right side
    339,602.40x = 154,278,381,818.88
  5. Step 5: Solve for x
    x = 154,278,381,818.88/339,602.40
  6. Step 6: Final answer
    x = 454,291.20

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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.