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Finding the Fourth Proportional to 830.77, 1,246.25 and 571.37

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Solution

The fourth proportional to 830.77, 1,246.25 and 571.37 is: 857.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.77 : 1,246.25 = 571.37 : x
  2. Step 2: Convert to fraction form
    830.77/1,246.25 = 571.37/x
  3. Step 3: Cross multiply
    830.77x = 1,246.25 × 571.37
  4. Step 4: Simplify right side
    830.77x = 712,065.06
  5. Step 5: Solve for x
    x = 712,065.06/830.77
  6. Step 6: Final answer
    x = 857.12

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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.