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Finding the Fourth Proportional to 730.50, 1,095.75 and 456.21

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Solution

The fourth proportional to 730.50, 1,095.75 and 456.21 is: 684.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.50 : 1,095.75 = 456.21 : x
  2. Step 2: Convert to fraction form
    730.50/1,095.75 = 456.21/x
  3. Step 3: Cross multiply
    730.50x = 1,095.75 × 456.21
  4. Step 4: Simplify right side
    730.50x = 499,892.11
  5. Step 5: Solve for x
    x = 499,892.11/730.50
  6. Step 6: Final answer
    x = 684.32

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Double scale
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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.