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Finding the Fourth Proportional to 6,668,389.16, 9,198,994.74 and 4,216,869.08

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Solution

The fourth proportional to 6,668,389.16, 9,198,994.74 and 4,216,869.08 is: 5,817,140.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,668,389.16 : 9,198,994.74 = 4,216,869.08 : x
  2. Step 2: Convert to fraction form
    6,668,389.16/9,198,994.74 = 4,216,869.08/x
  3. Step 3: Cross multiply
    6,668,389.16x = 9,198,994.74 × 4,216,869.08
  4. Step 4: Simplify right side
    6,668,389.16x = 38,790,956,486,188.64
  5. Step 5: Solve for x
    x = 38,790,956,486,188.64/6,668,389.16
  6. Step 6: Final answer
    x = 5,817,140.48

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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.