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Finding the Fourth Proportional to 1,256,312.77, 1,734,019.55 and 712,766.72

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Solution

The fourth proportional to 1,256,312.77, 1,734,019.55 and 712,766.72 is: 983,792.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256,312.77 : 1,734,019.55 = 712,766.72 : x
  2. Step 2: Convert to fraction form
    1,256,312.77/1,734,019.55 = 712,766.72/x
  3. Step 3: Cross multiply
    1,256,312.77x = 1,734,019.55 × 712,766.72
  4. Step 4: Simplify right side
    1,256,312.77x = 1,235,951,430,513.47
  5. Step 5: Solve for x
    x = 1,235,951,430,513.47/1,256,312.77
  6. Step 6: Final answer
    x = 983,792.78

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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.