Home / 939,135.40-1,296,007.50-509,414.20

Finding the Fourth Proportional to 939,135.40, 1,296,007.50 and 509,414.20

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Solution

The fourth proportional to 939,135.40, 1,296,007.50 and 509,414.20 is: 702,991.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,135.40 : 1,296,007.50 = 509,414.20 : x
  2. Step 2: Convert to fraction form
    939,135.40/1,296,007.50 = 509,414.20/x
  3. Step 3: Cross multiply
    939,135.40x = 1,296,007.50 × 509,414.20
  4. Step 4: Simplify right side
    939,135.40x = 660,204,623,806.50
  5. Step 5: Solve for x
    x = 660,204,623,806.50/939,135.40
  6. Step 6: Final answer
    x = 702,991.95

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Double scale
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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.