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Finding the Fourth Proportional to 1,388,434.59, 1,916,014.37 and 784,822.59

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Solution

The fourth proportional to 1,388,434.59, 1,916,014.37 and 784,822.59 is: 1,083,040.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,434.59 : 1,916,014.37 = 784,822.59 : x
  2. Step 2: Convert to fraction form
    1,388,434.59/1,916,014.37 = 784,822.59/x
  3. Step 3: Cross multiply
    1,388,434.59x = 1,916,014.37 × 784,822.59
  4. Step 4: Simplify right side
    1,388,434.59x = 1,503,731,356,416.51
  5. Step 5: Solve for x
    x = 1,503,731,356,416.51/1,388,434.59
  6. Step 6: Final answer
    x = 1,083,040.83

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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.