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Finding the Fourth Proportional to 487,109.26, 672,189.64 and 266,342.51

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Solution

The fourth proportional to 487,109.26, 672,189.64 and 266,342.51 is: 367,541.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,109.26 : 672,189.64 = 266,342.51 : x
  2. Step 2: Convert to fraction form
    487,109.26/672,189.64 = 266,342.51/x
  3. Step 3: Cross multiply
    487,109.26x = 672,189.64 × 266,342.51
  4. Step 4: Simplify right side
    487,109.26x = 179,032,675,913.60
  5. Step 5: Solve for x
    x = 179,032,675,913.60/487,109.26
  6. Step 6: Final answer
    x = 367,541.11

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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.