Home / 642,643.30-963,527.55-305,845.30

Finding the Fourth Proportional to 642,643.30, 963,527.55 and 305,845.30

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Solution

The fourth proportional to 642,643.30, 963,527.55 and 305,845.30 is: 458,559.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,643.30 : 963,527.55 = 305,845.30 : x
  2. Step 2: Convert to fraction form
    642,643.30/963,527.55 = 305,845.30/x
  3. Step 3: Cross multiply
    642,643.30x = 963,527.55 × 305,845.30
  4. Step 4: Simplify right side
    642,643.30x = 294,690,372,588.02
  5. Step 5: Solve for x
    x = 294,690,372,588.02/642,643.30
  6. Step 6: Final answer
    x = 458,559.78

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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.