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Finding the Fourth Proportional to 706.86, 1,058.04 and 511.20

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Solution

The fourth proportional to 706.86, 1,058.04 and 511.20 is: 765.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.86 : 1,058.04 = 511.20 : x
  2. Step 2: Convert to fraction form
    706.86/1,058.04 = 511.20/x
  3. Step 3: Cross multiply
    706.86x = 1,058.04 × 511.20
  4. Step 4: Simplify right side
    706.86x = 540,870.05
  5. Step 5: Solve for x
    x = 540,870.05/706.86
  6. Step 6: Final answer
    x = 765.17

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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.