Home / 939,137.40-1,296,010.26-509,416.20

Finding the Fourth Proportional to 939,137.40, 1,296,010.26 and 509,416.20

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Solution

The fourth proportional to 939,137.40, 1,296,010.26 and 509,416.20 is: 702,994.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,137.40 : 1,296,010.26 = 509,416.20 : x
  2. Step 2: Convert to fraction form
    939,137.40/1,296,010.26 = 509,416.20/x
  3. Step 3: Cross multiply
    939,137.40x = 1,296,010.26 × 509,416.20
  4. Step 4: Simplify right side
    939,137.40x = 660,208,621,810.21
  5. Step 5: Solve for x
    x = 660,208,621,810.21/939,137.40
  6. Step 6: Final answer
    x = 702,994.71

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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.