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Finding the Fourth Proportional to 880.03, 1,213.13 and 693.15

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Solution

The fourth proportional to 880.03, 1,213.13 and 693.15 is: 955.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.03 : 1,213.13 = 693.15 : x
  2. Step 2: Convert to fraction form
    880.03/1,213.13 = 693.15/x
  3. Step 3: Cross multiply
    880.03x = 1,213.13 × 693.15
  4. Step 4: Simplify right side
    880.03x = 840,878.24
  5. Step 5: Solve for x
    x = 840,878.24/880.03
  6. Step 6: Final answer
    x = 955.51

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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.