Home / 1,121.13-1,547.03-623.73

Finding the Fourth Proportional to 1,121.13, 1,547.03 and 623.73

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Solution

The fourth proportional to 1,121.13, 1,547.03 and 623.73 is: 860.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.13 : 1,547.03 = 623.73 : x
  2. Step 2: Convert to fraction form
    1,121.13/1,547.03 = 623.73/x
  3. Step 3: Cross multiply
    1,121.13x = 1,547.03 × 623.73
  4. Step 4: Simplify right side
    1,121.13x = 964,925.90
  5. Step 5: Solve for x
    x = 964,925.90/1,121.13
  6. Step 6: Final answer
    x = 860.67

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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.