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Finding the Fourth Proportional to 661,570.08, 991,435.77 and 345,396.30

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Solution

The fourth proportional to 661,570.08, 991,435.77 and 345,396.30 is: 517,614.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,570.08 : 991,435.77 = 345,396.30 : x
  2. Step 2: Convert to fraction form
    661,570.08/991,435.77 = 345,396.30/x
  3. Step 3: Cross multiply
    661,570.08x = 991,435.77 × 345,396.30
  4. Step 4: Simplify right side
    661,570.08x = 342,438,246,645.65
  5. Step 5: Solve for x
    x = 342,438,246,645.65/661,570.08
  6. Step 6: Final answer
    x = 517,614.47

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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.