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Finding the Fourth Proportional to 978,179.80, 1,370,851.40 and 978,179.80

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Solution

The fourth proportional to 978,179.80, 1,370,851.40 and 978,179.80 is: 1,370,851.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,179.80 : 1,370,851.40 = 978,179.80 : x
  2. Step 2: Convert to fraction form
    978,179.80/1,370,851.40 = 978,179.80/x
  3. Step 3: Cross multiply
    978,179.80x = 1,370,851.40 × 978,179.80
  4. Step 4: Simplify right side
    978,179.80x = 1,340,939,148,281.72
  5. Step 5: Solve for x
    x = 1,340,939,148,281.72/978,179.80
  6. Step 6: Final answer
    x = 1,370,851.40

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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.