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Finding the Fourth Proportional to 1,256,890.63, 1,734,494.48 and 683,920.93

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Solution

The fourth proportional to 1,256,890.63, 1,734,494.48 and 683,920.93 is: 943,802.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256,890.63 : 1,734,494.48 = 683,920.93 : x
  2. Step 2: Convert to fraction form
    1,256,890.63/1,734,494.48 = 683,920.93/x
  3. Step 3: Cross multiply
    1,256,890.63x = 1,734,494.48 × 683,920.93
  4. Step 4: Simplify right side
    1,256,890.63x = 1,186,257,065,749.39
  5. Step 5: Solve for x
    x = 1,186,257,065,749.39/1,256,890.63
  6. Step 6: Final answer
    x = 943,802.94

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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.