Home / 1,216,815.21-1,679,429.63-781,776.39

Finding the Fourth Proportional to 1,216,815.21, 1,679,429.63 and 781,776.39

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Solution

The fourth proportional to 1,216,815.21, 1,679,429.63 and 781,776.39 is: 1,078,995.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,815.21 : 1,679,429.63 = 781,776.39 : x
  2. Step 2: Convert to fraction form
    1,216,815.21/1,679,429.63 = 781,776.39/x
  3. Step 3: Cross multiply
    1,216,815.21x = 1,679,429.63 × 781,776.39
  4. Step 4: Simplify right side
    1,216,815.21x = 1,312,938,433,400.44
  5. Step 5: Solve for x
    x = 1,312,938,433,400.44/1,216,815.21
  6. Step 6: Final answer
    x = 1,078,995.74

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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.