Home / 1,515.90-2,091.65-918.27

Finding the Fourth Proportional to 1,515.90, 2,091.65 and 918.27

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Solution

The fourth proportional to 1,515.90, 2,091.65 and 918.27 is: 1,267.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.90 : 2,091.65 = 918.27 : x
  2. Step 2: Convert to fraction form
    1,515.90/2,091.65 = 918.27/x
  3. Step 3: Cross multiply
    1,515.90x = 2,091.65 × 918.27
  4. Step 4: Simplify right side
    1,515.90x = 1,920,705.66
  5. Step 5: Solve for x
    x = 1,920,705.66/1,515.90
  6. Step 6: Final answer
    x = 1,267.04

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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.