Home / 1,216,814.21-1,679,428.25-781,775.39

Finding the Fourth Proportional to 1,216,814.21, 1,679,428.25 and 781,775.39

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Solution

The fourth proportional to 1,216,814.21, 1,679,428.25 and 781,775.39 is: 1,078,994.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,814.21 : 1,679,428.25 = 781,775.39 : x
  2. Step 2: Convert to fraction form
    1,216,814.21/1,679,428.25 = 781,775.39/x
  3. Step 3: Cross multiply
    1,216,814.21x = 1,679,428.25 × 781,775.39
  4. Step 4: Simplify right side
    1,216,814.21x = 1,312,935,675,120.77
  5. Step 5: Solve for x
    x = 1,312,935,675,120.77/1,216,814.21
  6. Step 6: Final answer
    x = 1,078,994.36

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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.