Home / 644,986.54-890,092.08-354,610.38

Finding the Fourth Proportional to 644,986.54, 890,092.08 and 354,610.38

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Solution

The fourth proportional to 644,986.54, 890,092.08 and 354,610.38 is: 489,368.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,986.54 : 890,092.08 = 354,610.38 : x
  2. Step 2: Convert to fraction form
    644,986.54/890,092.08 = 354,610.38/x
  3. Step 3: Cross multiply
    644,986.54x = 890,092.08 × 354,610.38
  4. Step 4: Simplify right side
    644,986.54x = 315,635,890,723.79
  5. Step 5: Solve for x
    x = 315,635,890,723.79/644,986.54
  6. Step 6: Final answer
    x = 489,368.18

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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.