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Finding the Fourth Proportional to 887.08, 1,225.38 and 712.20

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Solution

The fourth proportional to 887.08, 1,225.38 and 712.20 is: 983.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.08 : 1,225.38 = 712.20 : x
  2. Step 2: Convert to fraction form
    887.08/1,225.38 = 712.20/x
  3. Step 3: Cross multiply
    887.08x = 1,225.38 × 712.20
  4. Step 4: Simplify right side
    887.08x = 872,715.64
  5. Step 5: Solve for x
    x = 872,715.64/887.08
  6. Step 6: Final answer
    x = 983.81

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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.