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Finding the Fourth Proportional to 1,191,746.93, 1,787,368.19 and 392,838.57

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Solution

The fourth proportional to 1,191,746.93, 1,787,368.19 and 392,838.57 is: 589,174.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191,746.93 : 1,787,368.19 = 392,838.57 : x
  2. Step 2: Convert to fraction form
    1,191,746.93/1,787,368.19 = 392,838.57/x
  3. Step 3: Cross multiply
    1,191,746.93x = 1,787,368.19 × 392,838.57
  4. Step 4: Simplify right side
    1,191,746.93x = 702,147,161,858.90
  5. Step 5: Solve for x
    x = 702,147,161,858.90/1,191,746.93
  6. Step 6: Final answer
    x = 589,174.72

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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.