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Finding the Fourth Proportional to 908,999.60, 1,363,499.40 and 309,907.40

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Solution

The fourth proportional to 908,999.60, 1,363,499.40 and 309,907.40 is: 464,861.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,999.60 : 1,363,499.40 = 309,907.40 : x
  2. Step 2: Convert to fraction form
    908,999.60/1,363,499.40 = 309,907.40/x
  3. Step 3: Cross multiply
    908,999.60x = 1,363,499.40 × 309,907.40
  4. Step 4: Simplify right side
    908,999.60x = 422,558,553,955.56
  5. Step 5: Solve for x
    x = 422,558,553,955.56/908,999.60
  6. Step 6: Final answer
    x = 464,861.10

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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.