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Finding the Fourth Proportional to 1,684,584.77, 2,324,721.87 and 920,638.40

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Solution

The fourth proportional to 1,684,584.77, 2,324,721.87 and 920,638.40 is: 1,270,478.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,684,584.77 : 2,324,721.87 = 920,638.40 : x
  2. Step 2: Convert to fraction form
    1,684,584.77/2,324,721.87 = 920,638.40/x
  3. Step 3: Cross multiply
    1,684,584.77x = 2,324,721.87 × 920,638.40
  4. Step 4: Simplify right side
    1,684,584.77x = 2,140,228,211,218.20
  5. Step 5: Solve for x
    x = 2,140,228,211,218.20/1,684,584.77
  6. Step 6: Final answer
    x = 1,270,478.19

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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.