Home / 1,556.15-2,331.80-977.81

Finding the Fourth Proportional to 1,556.15, 2,331.80 and 977.81

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Solution

The fourth proportional to 1,556.15, 2,331.80 and 977.81 is: 1,465.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.15 : 2,331.80 = 977.81 : x
  2. Step 2: Convert to fraction form
    1,556.15/2,331.80 = 977.81/x
  3. Step 3: Cross multiply
    1,556.15x = 2,331.80 × 977.81
  4. Step 4: Simplify right side
    1,556.15x = 2,280,058.30
  5. Step 5: Solve for x
    x = 2,280,058.30/1,556.15
  6. Step 6: Final answer
    x = 1,465.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.