Home / 1,222,420.21-1,688,088.60-787,600.87

Finding the Fourth Proportional to 1,222,420.21, 1,688,088.60 and 787,600.87

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Solution

The fourth proportional to 1,222,420.21, 1,688,088.60 and 787,600.87 is: 1,087,629.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,420.21 : 1,688,088.60 = 787,600.87 : x
  2. Step 2: Convert to fraction form
    1,222,420.21/1,688,088.60 = 787,600.87/x
  3. Step 3: Cross multiply
    1,222,420.21x = 1,688,088.60 × 787,600.87
  4. Step 4: Simplify right side
    1,222,420.21x = 1,329,540,045,776.86
  5. Step 5: Solve for x
    x = 1,329,540,045,776.86/1,222,420.21
  6. Step 6: Final answer
    x = 1,087,629.31

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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.