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Finding the Fourth Proportional to 578,817.06, 798,702.67 and 320,629.40

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Solution

The fourth proportional to 578,817.06, 798,702.67 and 320,629.40 is: 442,432.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,817.06 : 798,702.67 = 320,629.40 : x
  2. Step 2: Convert to fraction form
    578,817.06/798,702.67 = 320,629.40/x
  3. Step 3: Cross multiply
    578,817.06x = 798,702.67 × 320,629.40
  4. Step 4: Simplify right side
    578,817.06x = 256,087,557,262.91
  5. Step 5: Solve for x
    x = 256,087,557,262.91/578,817.06
  6. Step 6: Final answer
    x = 442,432.64

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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.