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Finding the Fourth Proportional to 1,020.53, 1,530.34 and 403.76

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Solution

The fourth proportional to 1,020.53, 1,530.34 and 403.76 is: 605.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.53 : 1,530.34 = 403.76 : x
  2. Step 2: Convert to fraction form
    1,020.53/1,530.34 = 403.76/x
  3. Step 3: Cross multiply
    1,020.53x = 1,530.34 × 403.76
  4. Step 4: Simplify right side
    1,020.53x = 617,892.89
  5. Step 5: Solve for x
    x = 617,892.89/1,020.53
  6. Step 6: Final answer
    x = 605.46

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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.