Home / 1,528.50-2,291.12-912.36

Finding the Fourth Proportional to 1,528.50, 2,291.12 and 912.36

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Solution

The fourth proportional to 1,528.50, 2,291.12 and 912.36 is: 1,367.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.50 : 2,291.12 = 912.36 : x
  2. Step 2: Convert to fraction form
    1,528.50/2,291.12 = 912.36/x
  3. Step 3: Cross multiply
    1,528.50x = 2,291.12 × 912.36
  4. Step 4: Simplify right side
    1,528.50x = 2,090,326.24
  5. Step 5: Solve for x
    x = 2,090,326.24/1,528.50
  6. Step 6: Final answer
    x = 1,367.57

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Half scale
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Double scale
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1.5x scale

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.