Home / 513,075.20-769,612.80-213,456.20

Finding the Fourth Proportional to 513,075.20, 769,612.80 and 213,456.20

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Solution

The fourth proportional to 513,075.20, 769,612.80 and 213,456.20 is: 320,184.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,075.20 : 769,612.80 = 213,456.20 : x
  2. Step 2: Convert to fraction form
    513,075.20/769,612.80 = 213,456.20/x
  3. Step 3: Cross multiply
    513,075.20x = 769,612.80 × 213,456.20
  4. Step 4: Simplify right side
    513,075.20x = 164,278,623,759.36
  5. Step 5: Solve for x
    x = 164,278,623,759.36/513,075.20
  6. Step 6: Final answer
    x = 320,184.30

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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.