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Finding the Fourth Proportional to 383,090.58, 528,688.88 and 211,008.51

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Solution

The fourth proportional to 383,090.58, 528,688.88 and 211,008.51 is: 291,204.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,090.58 : 528,688.88 = 211,008.51 : x
  2. Step 2: Convert to fraction form
    383,090.58/528,688.88 = 211,008.51/x
  3. Step 3: Cross multiply
    383,090.58x = 528,688.88 × 211,008.51
  4. Step 4: Simplify right side
    383,090.58x = 111,557,851,767.33
  5. Step 5: Solve for x
    x = 111,557,851,767.33/383,090.58
  6. Step 6: Final answer
    x = 291,204.89

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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.