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Finding the Fourth Proportional to 978,173.30, 1,370,842.30 and 978,173.30

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Solution

The fourth proportional to 978,173.30, 1,370,842.30 and 978,173.30 is: 1,370,842.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,173.30 : 1,370,842.30 = 978,173.30 : x
  2. Step 2: Convert to fraction form
    978,173.30/1,370,842.30 = 978,173.30/x
  3. Step 3: Cross multiply
    978,173.30x = 1,370,842.30 × 978,173.30
  4. Step 4: Simplify right side
    978,173.30x = 1,340,921,336,370.59
  5. Step 5: Solve for x
    x = 1,340,921,336,370.59/978,173.30
  6. Step 6: Final answer
    x = 1,370,842.30

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.