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Finding the Fourth Proportional to 548,721.30, 768,734.70 and 548,721.30

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Solution

The fourth proportional to 548,721.30, 768,734.70 and 548,721.30 is: 768,734.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,721.30 : 768,734.70 = 548,721.30 : x
  2. Step 2: Convert to fraction form
    548,721.30/768,734.70 = 548,721.30/x
  3. Step 3: Cross multiply
    548,721.30x = 768,734.70 × 548,721.30
  4. Step 4: Simplify right side
    548,721.30x = 421,821,103,939.11
  5. Step 5: Solve for x
    x = 421,821,103,939.11/548,721.30
  6. Step 6: Final answer
    x = 768,734.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.