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Finding the Fourth Proportional to 644,973.58, 890,073.50 and 354,597.73

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Solution

The fourth proportional to 644,973.58, 890,073.50 and 354,597.73 is: 489,350.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,973.58 : 890,073.50 = 354,597.73 : x
  2. Step 2: Convert to fraction form
    644,973.58/890,073.50 = 354,597.73/x
  3. Step 3: Cross multiply
    644,973.58x = 890,073.50 × 354,597.73
  4. Step 4: Simplify right side
    644,973.58x = 315,618,038,634.98
  5. Step 5: Solve for x
    x = 315,618,038,634.98/644,973.58
  6. Step 6: Final answer
    x = 489,350.34

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Double scale
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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.