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Finding the Fourth Proportional to 1,245.03, 1,717.59 and 846.21

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Solution

The fourth proportional to 1,245.03, 1,717.59 and 846.21 is: 1,167.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.03 : 1,717.59 = 846.21 : x
  2. Step 2: Convert to fraction form
    1,245.03/1,717.59 = 846.21/x
  3. Step 3: Cross multiply
    1,245.03x = 1,717.59 × 846.21
  4. Step 4: Simplify right side
    1,245.03x = 1,453,441.83
  5. Step 5: Solve for x
    x = 1,453,441.83/1,245.03
  6. Step 6: Final answer
    x = 1,167.40

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Double scale
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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.