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Finding the Fourth Proportional to 547,367.72, 755,722.88 and 489,907.40

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Solution

The fourth proportional to 547,367.72, 755,722.88 and 489,907.40 is: 676,390.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,367.72 : 755,722.88 = 489,907.40 : x
  2. Step 2: Convert to fraction form
    547,367.72/755,722.88 = 489,907.40/x
  3. Step 3: Cross multiply
    547,367.72x = 755,722.88 × 489,907.40
  4. Step 4: Simplify right side
    547,367.72x = 370,234,225,033.16
  5. Step 5: Solve for x
    x = 370,234,225,033.16/547,367.72
  6. Step 6: Final answer
    x = 676,390.32

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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.