Home / 1,131.36-1,688.80-1,048.96

Finding the Fourth Proportional to 1,131.36, 1,688.80 and 1,048.96

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Solution

The fourth proportional to 1,131.36, 1,688.80 and 1,048.96 is: 1,565.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.36 : 1,688.80 = 1,048.96 : x
  2. Step 2: Convert to fraction form
    1,131.36/1,688.80 = 1,048.96/x
  3. Step 3: Cross multiply
    1,131.36x = 1,688.80 × 1,048.96
  4. Step 4: Simplify right side
    1,131.36x = 1,771,483.65
  5. Step 5: Solve for x
    x = 1,771,483.65/1,131.36
  6. Step 6: Final answer
    x = 1,565.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.