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Finding the Fourth Proportional to 900,649, 1,242,900.48 and 492,755.68

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Solution

The fourth proportional to 900,649, 1,242,900.48 and 492,755.68 is: 680,005.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    900,649 : 1,242,900.48 = 492,755.68 : x
  2. Step 2: Convert to fraction form
    900,649/1,242,900.48 = 492,755.68/x
  3. Step 3: Cross multiply
    900,649x = 1,242,900.48 × 492,755.68
  4. Step 4: Simplify right side
    900,649x = 612,446,271,194.73
  5. Step 5: Solve for x
    x = 612,446,271,194.73/900,649
  6. Step 6: Final answer
    x = 680,005.50

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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.