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Finding the Fourth Proportional to 644,987.04, 890,092.77 and 354,610.88

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Solution

The fourth proportional to 644,987.04, 890,092.77 and 354,610.88 is: 489,368.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,987.04 : 890,092.77 = 354,610.88 : x
  2. Step 2: Convert to fraction form
    644,987.04/890,092.77 = 354,610.88/x
  3. Step 3: Cross multiply
    644,987.04x = 890,092.77 × 354,610.88
  4. Step 4: Simplify right side
    644,987.04x = 315,636,580,451.34
  5. Step 5: Solve for x
    x = 315,636,580,451.34/644,987.04
  6. Step 6: Final answer
    x = 489,368.87

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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.