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Finding the Fourth Proportional to 620,825.76, 931,410.36 and 247,111.20

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Solution

The fourth proportional to 620,825.76, 931,410.36 and 247,111.20 is: 370,735.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,825.76 : 931,410.36 = 247,111.20 : x
  2. Step 2: Convert to fraction form
    620,825.76/931,410.36 = 247,111.20/x
  3. Step 3: Cross multiply
    620,825.76x = 931,410.36 × 247,111.20
  4. Step 4: Simplify right side
    620,825.76x = 230,161,931,752.03
  5. Step 5: Solve for x
    x = 230,161,931,752.03/620,825.76
  6. Step 6: Final answer
    x = 370,735.15

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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.