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Finding the Fourth Proportional to 1,426, 1,966.60 and 928.18

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Solution

The fourth proportional to 1,426, 1,966.60 and 928.18 is: 1,280.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426 : 1,966.60 = 928.18 : x
  2. Step 2: Convert to fraction form
    1,426/1,966.60 = 928.18/x
  3. Step 3: Cross multiply
    1,426x = 1,966.60 × 928.18
  4. Step 4: Simplify right side
    1,426x = 1,825,358.79
  5. Step 5: Solve for x
    x = 1,825,358.79/1,426
  6. Step 6: Final answer
    x = 1,280.06

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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.