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Finding the Fourth Proportional to 1,019.60, 1,529.58 and 403.34

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Solution

The fourth proportional to 1,019.60, 1,529.58 and 403.34 is: 605.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,019.60 : 1,529.58 = 403.34 : x
  2. Step 2: Convert to fraction form
    1,019.60/1,529.58 = 403.34/x
  3. Step 3: Cross multiply
    1,019.60x = 1,529.58 × 403.34
  4. Step 4: Simplify right side
    1,019.60x = 616,940.80
  5. Step 5: Solve for x
    x = 616,940.80/1,019.60
  6. Step 6: Final answer
    x = 605.08

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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.