Home / 645,441.88-890,731.74-355,066.24

Finding the Fourth Proportional to 645,441.88, 890,731.74 and 355,066.24

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Solution

The fourth proportional to 645,441.88, 890,731.74 and 355,066.24 is: 490,003.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,441.88 : 890,731.74 = 355,066.24 : x
  2. Step 2: Convert to fraction form
    645,441.88/890,731.74 = 355,066.24/x
  3. Step 3: Cross multiply
    645,441.88x = 890,731.74 × 355,066.24
  4. Step 4: Simplify right side
    645,441.88x = 316,268,769,770.46
  5. Step 5: Solve for x
    x = 316,268,769,770.46/645,441.88
  6. Step 6: Final answer
    x = 490,003.48

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.