Home / 1,545.50-2,131.58-1,368.65

Finding the Fourth Proportional to 1,545.50, 2,131.58 and 1,368.65

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Solution

The fourth proportional to 1,545.50, 2,131.58 and 1,368.65 is: 1,887.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.50 : 2,131.58 = 1,368.65 : x
  2. Step 2: Convert to fraction form
    1,545.50/2,131.58 = 1,368.65/x
  3. Step 3: Cross multiply
    1,545.50x = 2,131.58 × 1,368.65
  4. Step 4: Simplify right side
    1,545.50x = 2,917,386.97
  5. Step 5: Solve for x
    x = 2,917,386.97/1,545.50
  6. Step 6: Final answer
    x = 1,887.67

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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.