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Finding the Fourth Proportional to 887.86, 1,225.39 and 677.64

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Solution

The fourth proportional to 887.86, 1,225.39 and 677.64 is: 935.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.86 : 1,225.39 = 677.64 : x
  2. Step 2: Convert to fraction form
    887.86/1,225.39 = 677.64/x
  3. Step 3: Cross multiply
    887.86x = 1,225.39 × 677.64
  4. Step 4: Simplify right side
    887.86x = 830,373.28
  5. Step 5: Solve for x
    x = 830,373.28/887.86
  6. Step 6: Final answer
    x = 935.25

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.