Home / 1,125.21-1,688.08-355.71

Finding the Fourth Proportional to 1,125.21, 1,688.08 and 355.71

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Solution

The fourth proportional to 1,125.21, 1,688.08 and 355.71 is: 533.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.21 : 1,688.08 = 355.71 : x
  2. Step 2: Convert to fraction form
    1,125.21/1,688.08 = 355.71/x
  3. Step 3: Cross multiply
    1,125.21x = 1,688.08 × 355.71
  4. Step 4: Simplify right side
    1,125.21x = 600,466.94
  5. Step 5: Solve for x
    x = 600,466.94/1,125.21
  6. Step 6: Final answer
    x = 533.65

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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.