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Finding the Fourth Proportional to 1,020.01, 1,530.63 and 442.89

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Solution

The fourth proportional to 1,020.01, 1,530.63 and 442.89 is: 664.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.01 : 1,530.63 = 442.89 : x
  2. Step 2: Convert to fraction form
    1,020.01/1,530.63 = 442.89/x
  3. Step 3: Cross multiply
    1,020.01x = 1,530.63 × 442.89
  4. Step 4: Simplify right side
    1,020.01x = 677,890.85
  5. Step 5: Solve for x
    x = 677,890.85/1,020.01
  6. Step 6: Final answer
    x = 664.59

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1.5x scale

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.