Home / 890,010.40-1,335,145.20-290,999.20

Finding the Fourth Proportional to 890,010.40, 1,335,145.20 and 290,999.20

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Solution

The fourth proportional to 890,010.40, 1,335,145.20 and 290,999.20 is: 436,541.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,010.40 : 1,335,145.20 = 290,999.20 : x
  2. Step 2: Convert to fraction form
    890,010.40/1,335,145.20 = 290,999.20/x
  3. Step 3: Cross multiply
    890,010.40x = 1,335,145.20 × 290,999.20
  4. Step 4: Simplify right side
    890,010.40x = 388,526,185,083.84
  5. Step 5: Solve for x
    x = 388,526,185,083.84/890,010.40
  6. Step 6: Final answer
    x = 436,541.17

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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.