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Finding the Fourth Proportional to 490,334.40, 676,620 and 275,457.60

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Solution

The fourth proportional to 490,334.40, 676,620 and 275,457.60 is: 380,108.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,334.40 : 676,620 = 275,457.60 : x
  2. Step 2: Convert to fraction form
    490,334.40/676,620 = 275,457.60/x
  3. Step 3: Cross multiply
    490,334.40x = 676,620 × 275,457.60
  4. Step 4: Simplify right side
    490,334.40x = 186,380,121,312.00
  5. Step 5: Solve for x
    x = 186,380,121,312.00/490,334.40
  6. Step 6: Final answer
    x = 380,108.19

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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.