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Finding the Fourth Proportional to 550,266.70, 825,400.05 and 485,312.80

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Solution

The fourth proportional to 550,266.70, 825,400.05 and 485,312.80 is: 727,969.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,266.70 : 825,400.05 = 485,312.80 : x
  2. Step 2: Convert to fraction form
    550,266.70/825,400.05 = 485,312.80/x
  3. Step 3: Cross multiply
    550,266.70x = 825,400.05 × 485,312.80
  4. Step 4: Simplify right side
    550,266.70x = 400,577,209,385.64
  5. Step 5: Solve for x
    x = 400,577,209,385.64/550,266.70
  6. Step 6: Final answer
    x = 727,969.20

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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.