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Finding the Fourth Proportional to 615.57, 847.71 and 603.42

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Solution

The fourth proportional to 615.57, 847.71 and 603.42 is: 830.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.57 : 847.71 = 603.42 : x
  2. Step 2: Convert to fraction form
    615.57/847.71 = 603.42/x
  3. Step 3: Cross multiply
    615.57x = 847.71 × 603.42
  4. Step 4: Simplify right side
    615.57x = 511,525.17
  5. Step 5: Solve for x
    x = 511,525.17/615.57
  6. Step 6: Final answer
    x = 830.98

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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.