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Finding the Fourth Proportional to 443,907.69, 612,190.45 and 290,890.31

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Solution

The fourth proportional to 443,907.69, 612,190.45 and 290,890.31 is: 401,165.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,907.69 : 612,190.45 = 290,890.31 : x
  2. Step 2: Convert to fraction form
    443,907.69/612,190.45 = 290,890.31/x
  3. Step 3: Cross multiply
    443,907.69x = 612,190.45 × 290,890.31
  4. Step 4: Simplify right side
    443,907.69x = 178,080,265,264.14
  5. Step 5: Solve for x
    x = 178,080,265,264.14/443,907.69
  6. Step 6: Final answer
    x = 401,165.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.