Home / 1,121.45-1,547.60-624.14

Finding the Fourth Proportional to 1,121.45, 1,547.60 and 624.14

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Solution

The fourth proportional to 1,121.45, 1,547.60 and 624.14 is: 861.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.45 : 1,547.60 = 624.14 : x
  2. Step 2: Convert to fraction form
    1,121.45/1,547.60 = 624.14/x
  3. Step 3: Cross multiply
    1,121.45x = 1,547.60 × 624.14
  4. Step 4: Simplify right side
    1,121.45x = 965,919.06
  5. Step 5: Solve for x
    x = 965,919.06/1,121.45
  6. Step 6: Final answer
    x = 861.31

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1.5x scale

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.