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Finding the Fourth Proportional to 830.19, 1,145.46 and 546.58

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Solution

The fourth proportional to 830.19, 1,145.46 and 546.58 is: 754.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.19 : 1,145.46 = 546.58 : x
  2. Step 2: Convert to fraction form
    830.19/1,145.46 = 546.58/x
  3. Step 3: Cross multiply
    830.19x = 1,145.46 × 546.58
  4. Step 4: Simplify right side
    830.19x = 626,079.49
  5. Step 5: Solve for x
    x = 626,079.49/830.19
  6. Step 6: Final answer
    x = 754.14

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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.