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Finding the Fourth Proportional to 513,075.80, 768,738.90 and 423,846.20

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Solution

The fourth proportional to 513,075.80, 768,738.90 and 423,846.20 is: 635,046.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,075.80 : 768,738.90 = 423,846.20 : x
  2. Step 2: Convert to fraction form
    513,075.80/768,738.90 = 423,846.20/x
  3. Step 3: Cross multiply
    513,075.80x = 768,738.90 × 423,846.20
  4. Step 4: Simplify right side
    513,075.80x = 325,827,061,557.18
  5. Step 5: Solve for x
    x = 325,827,061,557.18/513,075.80
  6. Step 6: Final answer
    x = 635,046.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.