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Finding the Fourth Proportional to 1,295,581.36, 1,787,905.40 and 722,658.64

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Solution

The fourth proportional to 1,295,581.36, 1,787,905.40 and 722,658.64 is: 997,270.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295,581.36 : 1,787,905.40 = 722,658.64 : x
  2. Step 2: Convert to fraction form
    1,295,581.36/1,787,905.40 = 722,658.64/x
  3. Step 3: Cross multiply
    1,295,581.36x = 1,787,905.40 × 722,658.64
  4. Step 4: Simplify right side
    1,295,581.36x = 1,292,045,284,812.66
  5. Step 5: Solve for x
    x = 1,292,045,284,812.66/1,295,581.36
  6. Step 6: Final answer
    x = 997,270.67

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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.