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Finding the Fourth Proportional to 1,258.12, 1,887.68 and 564.60

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Solution

The fourth proportional to 1,258.12, 1,887.68 and 564.60 is: 847.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258.12 : 1,887.68 = 564.60 : x
  2. Step 2: Convert to fraction form
    1,258.12/1,887.68 = 564.60/x
  3. Step 3: Cross multiply
    1,258.12x = 1,887.68 × 564.60
  4. Step 4: Simplify right side
    1,258.12x = 1,065,784.13
  5. Step 5: Solve for x
    x = 1,065,784.13/1,258.12
  6. Step 6: Final answer
    x = 847.12

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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.