Home / 877,983.72-1,211,592.78-515,401.80

Finding the Fourth Proportional to 877,983.72, 1,211,592.78 and 515,401.80

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Solution

The fourth proportional to 877,983.72, 1,211,592.78 and 515,401.80 is: 711,239.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,983.72 : 1,211,592.78 = 515,401.80 : x
  2. Step 2: Convert to fraction form
    877,983.72/1,211,592.78 = 515,401.80/x
  3. Step 3: Cross multiply
    877,983.72x = 1,211,592.78 × 515,401.80
  4. Step 4: Simplify right side
    877,983.72x = 624,457,099,679.00
  5. Step 5: Solve for x
    x = 624,457,099,679.00/877,983.72
  6. Step 6: Final answer
    x = 711,239.95

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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.