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Finding the Fourth Proportional to 1,020.85, 1,529.95 and 493.99

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Solution

The fourth proportional to 1,020.85, 1,529.95 and 493.99 is: 740.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.85 : 1,529.95 = 493.99 : x
  2. Step 2: Convert to fraction form
    1,020.85/1,529.95 = 493.99/x
  3. Step 3: Cross multiply
    1,020.85x = 1,529.95 × 493.99
  4. Step 4: Simplify right side
    1,020.85x = 755,774.94
  5. Step 5: Solve for x
    x = 755,774.94/1,020.85
  6. Step 6: Final answer
    x = 740.34

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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.