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Finding the Fourth Proportional to 710.86, 1,065.54 and 300.28

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Solution

The fourth proportional to 710.86, 1,065.54 and 300.28 is: 450.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.86 : 1,065.54 = 300.28 : x
  2. Step 2: Convert to fraction form
    710.86/1,065.54 = 300.28/x
  3. Step 3: Cross multiply
    710.86x = 1,065.54 × 300.28
  4. Step 4: Simplify right side
    710.86x = 319,960.35
  5. Step 5: Solve for x
    x = 319,960.35/710.86
  6. Step 6: Final answer
    x = 450.10

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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.