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Finding the Fourth Proportional to 380,801.73, 525,497.45 and 211,032.21

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Solution

The fourth proportional to 380,801.73, 525,497.45 and 211,032.21 is: 291,219.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,801.73 : 525,497.45 = 211,032.21 : x
  2. Step 2: Convert to fraction form
    380,801.73/525,497.45 = 211,032.21/x
  3. Step 3: Cross multiply
    380,801.73x = 525,497.45 × 211,032.21
  4. Step 4: Simplify right side
    380,801.73x = 110,896,887,167.70
  5. Step 5: Solve for x
    x = 110,896,887,167.70/380,801.73
  6. Step 6: Final answer
    x = 291,219.49

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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.