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Finding the Fourth Proportional to 680.01, 1,020.05 and 355.47

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Solution

The fourth proportional to 680.01, 1,020.05 and 355.47 is: 533.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.01 : 1,020.05 = 355.47 : x
  2. Step 2: Convert to fraction form
    680.01/1,020.05 = 355.47/x
  3. Step 3: Cross multiply
    680.01x = 1,020.05 × 355.47
  4. Step 4: Simplify right side
    680.01x = 362,595.40
  5. Step 5: Solve for x
    x = 362,595.40/680.01
  6. Step 6: Final answer
    x = 533.22

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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.