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Finding the Fourth Proportional to 1,258.42, 1,887.57 and 607.18

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Solution

The fourth proportional to 1,258.42, 1,887.57 and 607.18 is: 910.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258.42 : 1,887.57 = 607.18 : x
  2. Step 2: Convert to fraction form
    1,258.42/1,887.57 = 607.18/x
  3. Step 3: Cross multiply
    1,258.42x = 1,887.57 × 607.18
  4. Step 4: Simplify right side
    1,258.42x = 1,146,094.75
  5. Step 5: Solve for x
    x = 1,146,094.75/1,258.42
  6. Step 6: Final answer
    x = 910.74

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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.