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Finding the Fourth Proportional to 578,702.52, 798,600.78 and 320,578.65

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Solution

The fourth proportional to 578,702.52, 798,600.78 and 320,578.65 is: 442,393.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,702.52 : 798,600.78 = 320,578.65 : x
  2. Step 2: Convert to fraction form
    578,702.52/798,600.78 = 320,578.65/x
  3. Step 3: Cross multiply
    578,702.52x = 798,600.78 × 320,578.65
  4. Step 4: Simplify right side
    578,702.52x = 256,014,359,941.35
  5. Step 5: Solve for x
    x = 256,014,359,941.35/578,702.52
  6. Step 6: Final answer
    x = 442,393.72

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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.