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Finding the Fourth Proportional to 1,659.80, 2,289.86 and 1,030.12

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Solution

The fourth proportional to 1,659.80, 2,289.86 and 1,030.12 is: 1,421.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,659.80 : 2,289.86 = 1,030.12 : x
  2. Step 2: Convert to fraction form
    1,659.80/2,289.86 = 1,030.12/x
  3. Step 3: Cross multiply
    1,659.80x = 2,289.86 × 1,030.12
  4. Step 4: Simplify right side
    1,659.80x = 2,358,830.58
  5. Step 5: Solve for x
    x = 2,358,830.58/1,659.80
  6. Step 6: Final answer
    x = 1,421.15

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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.