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Finding the Fourth Proportional to 529.30, 730.38 and 490.11

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Solution

The fourth proportional to 529.30, 730.38 and 490.11 is: 676.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.30 : 730.38 = 490.11 : x
  2. Step 2: Convert to fraction form
    529.30/730.38 = 490.11/x
  3. Step 3: Cross multiply
    529.30x = 730.38 × 490.11
  4. Step 4: Simplify right side
    529.30x = 357,966.54
  5. Step 5: Solve for x
    x = 357,966.54/529.30
  6. Step 6: Final answer
    x = 676.30

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.