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Finding the Fourth Proportional to 290,952,207.70, 436,428,311.55 and 259,384,612.30

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Solution

The fourth proportional to 290,952,207.70, 436,428,311.55 and 259,384,612.30 is: 389,076,918.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,952,207.70 : 436,428,311.55 = 259,384,612.30 : x
  2. Step 2: Convert to fraction form
    290,952,207.70/436,428,311.55 = 259,384,612.30/x
  3. Step 3: Cross multiply
    290,952,207.70x = 436,428,311.55 × 259,384,612.30
  4. Step 4: Simplify right side
    290,952,207.70x = 113,202,788,388,140,368
  5. Step 5: Solve for x
    x = 113,202,788,388,140,368/290,952,207.70
  6. Step 6: Final answer
    x = 389,076,918.45

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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.