Home / 890,009.40-1,335,143.70-290,998.20

Finding the Fourth Proportional to 890,009.40, 1,335,143.70 and 290,998.20

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Solution

The fourth proportional to 890,009.40, 1,335,143.70 and 290,998.20 is: 436,539.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,009.40 : 1,335,143.70 = 290,998.20 : x
  2. Step 2: Convert to fraction form
    890,009.40/1,335,143.70 = 290,998.20/x
  3. Step 3: Cross multiply
    890,009.40x = 1,335,143.70 × 290,998.20
  4. Step 4: Simplify right side
    890,009.40x = 388,524,413,441.34
  5. Step 5: Solve for x
    x = 388,524,413,441.34/890,009.40
  6. Step 6: Final answer
    x = 436,539.67

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Double scale
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Similar ratio
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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.