Home / 1,121.30-1,547.34-623.93

Finding the Fourth Proportional to 1,121.30, 1,547.34 and 623.93

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Solution

The fourth proportional to 1,121.30, 1,547.34 and 623.93 is: 860.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.30 : 1,547.34 = 623.93 : x
  2. Step 2: Convert to fraction form
    1,121.30/1,547.34 = 623.93/x
  3. Step 3: Cross multiply
    1,121.30x = 1,547.34 × 623.93
  4. Step 4: Simplify right side
    1,121.30x = 965,424.11
  5. Step 5: Solve for x
    x = 965,424.11/1,121.30
  6. Step 6: Final answer
    x = 860.99

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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.