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Finding the Fourth Proportional to 685,539.75, 946,038.29 and 395,044.59

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Solution

The fourth proportional to 685,539.75, 946,038.29 and 395,044.59 is: 545,157.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,539.75 : 946,038.29 = 395,044.59 : x
  2. Step 2: Convert to fraction form
    685,539.75/946,038.29 = 395,044.59/x
  3. Step 3: Cross multiply
    685,539.75x = 946,038.29 × 395,044.59
  4. Step 4: Simplify right side
    685,539.75x = 373,727,309,969.77
  5. Step 5: Solve for x
    x = 373,727,309,969.77/685,539.75
  6. Step 6: Final answer
    x = 545,157.75

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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.