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Finding the Fourth Proportional to 859,611.48, 1,185,960.72 and 491,820

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Solution

The fourth proportional to 859,611.48, 1,185,960.72 and 491,820 is: 678,538.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,611.48 : 1,185,960.72 = 491,820 : x
  2. Step 2: Convert to fraction form
    859,611.48/1,185,960.72 = 491,820/x
  3. Step 3: Cross multiply
    859,611.48x = 1,185,960.72 × 491,820
  4. Step 4: Simplify right side
    859,611.48x = 583,279,201,310.40
  5. Step 5: Solve for x
    x = 583,279,201,310.40/859,611.48
  6. Step 6: Final answer
    x = 678,538.17

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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.