Home / 1,121.18-1,547.15-623.76

Finding the Fourth Proportional to 1,121.18, 1,547.15 and 623.76

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Solution

The fourth proportional to 1,121.18, 1,547.15 and 623.76 is: 860.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.18 : 1,547.15 = 623.76 : x
  2. Step 2: Convert to fraction form
    1,121.18/1,547.15 = 623.76/x
  3. Step 3: Cross multiply
    1,121.18x = 1,547.15 × 623.76
  4. Step 4: Simplify right side
    1,121.18x = 965,050.28
  5. Step 5: Solve for x
    x = 965,050.28/1,121.18
  6. Step 6: Final answer
    x = 860.75

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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.