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Finding the Fourth Proportional to 1,222,123, 1,686,529.76 and 685,579

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Solution

The fourth proportional to 1,222,123, 1,686,529.76 and 685,579 is: 946,099.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,123 : 1,686,529.76 = 685,579 : x
  2. Step 2: Convert to fraction form
    1,222,123/1,686,529.76 = 685,579/x
  3. Step 3: Cross multiply
    1,222,123x = 1,686,529.76 × 685,579
  4. Step 4: Simplify right side
    1,222,123x = 1,156,249,386,331.04
  5. Step 5: Solve for x
    x = 1,156,249,386,331.04/1,222,123
  6. Step 6: Final answer
    x = 946,099.03

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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.