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Finding the Fourth Proportional to 1,210.76, 1,812.69 and 948.32

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Solution

The fourth proportional to 1,210.76, 1,812.69 and 948.32 is: 1,419.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.76 : 1,812.69 = 948.32 : x
  2. Step 2: Convert to fraction form
    1,210.76/1,812.69 = 948.32/x
  3. Step 3: Cross multiply
    1,210.76x = 1,812.69 × 948.32
  4. Step 4: Simplify right side
    1,210.76x = 1,719,001.12
  5. Step 5: Solve for x
    x = 1,719,001.12/1,210.76
  6. Step 6: Final answer
    x = 1,419.78

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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.