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Finding the Fourth Proportional to 1,230.58, 1,700.36 and 983.93

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Solution

The fourth proportional to 1,230.58, 1,700.36 and 983.93 is: 1,359.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.58 : 1,700.36 = 983.93 : x
  2. Step 2: Convert to fraction form
    1,230.58/1,700.36 = 983.93/x
  3. Step 3: Cross multiply
    1,230.58x = 1,700.36 × 983.93
  4. Step 4: Simplify right side
    1,230.58x = 1,673,030.30
  5. Step 5: Solve for x
    x = 1,673,030.30/1,230.58
  6. Step 6: Final answer
    x = 1,359.55

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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.