Home / 1,217.40-1,823.81-971.07

Finding the Fourth Proportional to 1,217.40, 1,823.81 and 971.07

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Solution

The fourth proportional to 1,217.40, 1,823.81 and 971.07 is: 1,454.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.40 : 1,823.81 = 971.07 : x
  2. Step 2: Convert to fraction form
    1,217.40/1,823.81 = 971.07/x
  3. Step 3: Cross multiply
    1,217.40x = 1,823.81 × 971.07
  4. Step 4: Simplify right side
    1,217.40x = 1,771,042.32
  5. Step 5: Solve for x
    x = 1,771,042.32/1,217.40
  6. Step 6: Final answer
    x = 1,454.77

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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.