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Finding the Fourth Proportional to 890,481.90, 1,335,852.45 and 291,297.90

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Solution

The fourth proportional to 890,481.90, 1,335,852.45 and 291,297.90 is: 436,989.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,481.90 : 1,335,852.45 = 291,297.90 : x
  2. Step 2: Convert to fraction form
    890,481.90/1,335,852.45 = 291,297.90/x
  3. Step 3: Cross multiply
    890,481.90x = 1,335,852.45 × 291,297.90
  4. Step 4: Simplify right side
    890,481.90x = 389,131,013,394.86
  5. Step 5: Solve for x
    x = 389,131,013,394.86/890,481.90
  6. Step 6: Final answer
    x = 436,989.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.