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Finding the Fourth Proportional to 1,018.76, 1,528.12 and 249.26

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Solution

The fourth proportional to 1,018.76, 1,528.12 and 249.26 is: 373.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018.76 : 1,528.12 = 249.26 : x
  2. Step 2: Convert to fraction form
    1,018.76/1,528.12 = 249.26/x
  3. Step 3: Cross multiply
    1,018.76x = 1,528.12 × 249.26
  4. Step 4: Simplify right side
    1,018.76x = 380,899.19
  5. Step 5: Solve for x
    x = 380,899.19/1,018.76
  6. Step 6: Final answer
    x = 373.89

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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.