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Finding the Fourth Proportional to 978,225.70, 1,372,004.30 and 978,225.70

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Solution

The fourth proportional to 978,225.70, 1,372,004.30 and 978,225.70 is: 1,372,004.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,225.70 : 1,372,004.30 = 978,225.70 : x
  2. Step 2: Convert to fraction form
    978,225.70/1,372,004.30 = 978,225.70/x
  3. Step 3: Cross multiply
    978,225.70x = 1,372,004.30 × 978,225.70
  4. Step 4: Simplify right side
    978,225.70x = 1,342,129,866,770.51
  5. Step 5: Solve for x
    x = 1,342,129,866,770.51/978,225.70
  6. Step 6: Final answer
    x = 1,372,004.30

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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.