Home / 1,406.60-1,941.10-777.12

Finding the Fourth Proportional to 1,406.60, 1,941.10 and 777.12

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Solution

The fourth proportional to 1,406.60, 1,941.10 and 777.12 is: 1,072.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,406.60 : 1,941.10 = 777.12 : x
  2. Step 2: Convert to fraction form
    1,406.60/1,941.10 = 777.12/x
  3. Step 3: Cross multiply
    1,406.60x = 1,941.10 × 777.12
  4. Step 4: Simplify right side
    1,406.60x = 1,508,467.63
  5. Step 5: Solve for x
    x = 1,508,467.63/1,406.60
  6. Step 6: Final answer
    x = 1,072.42

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1.5x scale

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.