Home / 877,639.20-1,211,079.24-515,077.80

Finding the Fourth Proportional to 877,639.20, 1,211,079.24 and 515,077.80

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Solution

The fourth proportional to 877,639.20, 1,211,079.24 and 515,077.80 is: 710,770.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,639.20 : 1,211,079.24 = 515,077.80 : x
  2. Step 2: Convert to fraction form
    877,639.20/1,211,079.24 = 515,077.80/x
  3. Step 3: Cross multiply
    877,639.20x = 1,211,079.24 × 515,077.80
  4. Step 4: Simplify right side
    877,639.20x = 623,800,030,564.87
  5. Step 5: Solve for x
    x = 623,800,030,564.87/877,639.20
  6. Step 6: Final answer
    x = 710,770.47

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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.