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Finding the Fourth Proportional to 620,993.83, 931,397.16 and 397,913.17

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Solution

The fourth proportional to 620,993.83, 931,397.16 and 397,913.17 is: 596,809.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,993.83 : 931,397.16 = 397,913.17 : x
  2. Step 2: Convert to fraction form
    620,993.83/931,397.16 = 397,913.17/x
  3. Step 3: Cross multiply
    620,993.83x = 931,397.16 × 397,913.17
  4. Step 4: Simplify right side
    620,993.83x = 370,615,191,807.61
  5. Step 5: Solve for x
    x = 370,615,191,807.61/620,993.83
  6. Step 6: Final answer
    x = 596,809.78

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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.