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Finding the Fourth Proportional to 1,301.90, 1,798.70 and 910.67

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Solution

The fourth proportional to 1,301.90, 1,798.70 and 910.67 is: 1,258.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,301.90 : 1,798.70 = 910.67 : x
  2. Step 2: Convert to fraction form
    1,301.90/1,798.70 = 910.67/x
  3. Step 3: Cross multiply
    1,301.90x = 1,798.70 × 910.67
  4. Step 4: Simplify right side
    1,301.90x = 1,638,008.58
  5. Step 5: Solve for x
    x = 1,638,008.58/1,301.90
  6. Step 6: Final answer
    x = 1,258.17

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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.