Home / 2,421.40-3,631.32-777.56

Finding the Fourth Proportional to 2,421.40, 3,631.32 and 777.56

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Solution

The fourth proportional to 2,421.40, 3,631.32 and 777.56 is: 1,166.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.40 : 3,631.32 = 777.56 : x
  2. Step 2: Convert to fraction form
    2,421.40/3,631.32 = 777.56/x
  3. Step 3: Cross multiply
    2,421.40x = 3,631.32 × 777.56
  4. Step 4: Simplify right side
    2,421.40x = 2,823,569.18
  5. Step 5: Solve for x
    x = 2,823,569.18/2,421.40
  6. Step 6: Final answer
    x = 1,166.09

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1.5x scale

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.