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Finding the Fourth Proportional to 315,636.08, 435,570.75 and 172,396.64

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Solution

The fourth proportional to 315,636.08, 435,570.75 and 172,396.64 is: 237,903.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,636.08 : 435,570.75 = 172,396.64 : x
  2. Step 2: Convert to fraction form
    315,636.08/435,570.75 = 172,396.64/x
  3. Step 3: Cross multiply
    315,636.08x = 435,570.75 × 172,396.64
  4. Step 4: Simplify right side
    315,636.08x = 75,090,933,782.28
  5. Step 5: Solve for x
    x = 75,090,933,782.28/315,636.08
  6. Step 6: Final answer
    x = 237,903.52

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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.