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Finding the Fourth Proportional to 830.89, 1,146.43 and 527.95

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Solution

The fourth proportional to 830.89, 1,146.43 and 527.95 is: 728.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.89 : 1,146.43 = 527.95 : x
  2. Step 2: Convert to fraction form
    830.89/1,146.43 = 527.95/x
  3. Step 3: Cross multiply
    830.89x = 1,146.43 × 527.95
  4. Step 4: Simplify right side
    830.89x = 605,257.72
  5. Step 5: Solve for x
    x = 605,257.72/830.89
  6. Step 6: Final answer
    x = 728.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.