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Finding the Fourth Proportional to 1,317,698.70, 1,976,548.05 and 868,926.30

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Solution

The fourth proportional to 1,317,698.70, 1,976,548.05 and 868,926.30 is: 1,303,389.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317,698.70 : 1,976,548.05 = 868,926.30 : x
  2. Step 2: Convert to fraction form
    1,317,698.70/1,976,548.05 = 868,926.30/x
  3. Step 3: Cross multiply
    1,317,698.70x = 1,976,548.05 × 868,926.30
  4. Step 4: Simplify right side
    1,317,698.70x = 1,717,474,583,858.72
  5. Step 5: Solve for x
    x = 1,717,474,583,858.72/1,317,698.70
  6. Step 6: Final answer
    x = 1,303,389.45

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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.