Home / 1,320.56-1,979.52-498.60

Finding the Fourth Proportional to 1,320.56, 1,979.52 and 498.60

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Solution

The fourth proportional to 1,320.56, 1,979.52 and 498.60 is: 747.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.56 : 1,979.52 = 498.60 : x
  2. Step 2: Convert to fraction form
    1,320.56/1,979.52 = 498.60/x
  3. Step 3: Cross multiply
    1,320.56x = 1,979.52 × 498.60
  4. Step 4: Simplify right side
    1,320.56x = 986,988.67
  5. Step 5: Solve for x
    x = 986,988.67/1,320.56
  6. Step 6: Final answer
    x = 747.40

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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.