Home / 1,349.60-2,023.80-619.40

Finding the Fourth Proportional to 1,349.60, 2,023.80 and 619.40

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Solution

The fourth proportional to 1,349.60, 2,023.80 and 619.40 is: 928.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,349.60 : 2,023.80 = 619.40 : x
  2. Step 2: Convert to fraction form
    1,349.60/2,023.80 = 619.40/x
  3. Step 3: Cross multiply
    1,349.60x = 2,023.80 × 619.40
  4. Step 4: Simplify right side
    1,349.60x = 1,253,541.72
  5. Step 5: Solve for x
    x = 1,253,541.72/1,349.60
  6. Step 6: Final answer
    x = 928.82

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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.