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Finding the Fourth Proportional to 730.55, 1,095.84 and 319.47

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Solution

The fourth proportional to 730.55, 1,095.84 and 319.47 is: 479.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.55 : 1,095.84 = 319.47 : x
  2. Step 2: Convert to fraction form
    730.55/1,095.84 = 319.47/x
  3. Step 3: Cross multiply
    730.55x = 1,095.84 × 319.47
  4. Step 4: Simplify right side
    730.55x = 350,088.00
  5. Step 5: Solve for x
    x = 350,088.00/730.55
  6. Step 6: Final answer
    x = 479.21

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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.