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Finding the Fourth Proportional to 1,357.60, 2,030.30 and 992.02

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Solution

The fourth proportional to 1,357.60, 2,030.30 and 992.02 is: 1,483.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.60 : 2,030.30 = 992.02 : x
  2. Step 2: Convert to fraction form
    1,357.60/2,030.30 = 992.02/x
  3. Step 3: Cross multiply
    1,357.60x = 2,030.30 × 992.02
  4. Step 4: Simplify right side
    1,357.60x = 2,014,098.21
  5. Step 5: Solve for x
    x = 2,014,098.21/1,357.60
  6. Step 6: Final answer
    x = 1,483.57

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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.