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Finding the Fourth Proportional to 695,603.31, 959,886.49 and 385,485.09

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Solution

The fourth proportional to 695,603.31, 959,886.49 and 385,485.09 is: 531,943.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,603.31 : 959,886.49 = 385,485.09 : x
  2. Step 2: Convert to fraction form
    695,603.31/959,886.49 = 385,485.09/x
  3. Step 3: Cross multiply
    695,603.31x = 959,886.49 × 385,485.09
  4. Step 4: Simplify right side
    695,603.31x = 370,021,929,987.43
  5. Step 5: Solve for x
    x = 370,021,929,987.43/695,603.31
  6. Step 6: Final answer
    x = 531,943.89

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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.