Home / 768,020.80-1,152,031.20-643,604.80

Finding the Fourth Proportional to 768,020.80, 1,152,031.20 and 643,604.80

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Solution

The fourth proportional to 768,020.80, 1,152,031.20 and 643,604.80 is: 965,407.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,020.80 : 1,152,031.20 = 643,604.80 : x
  2. Step 2: Convert to fraction form
    768,020.80/1,152,031.20 = 643,604.80/x
  3. Step 3: Cross multiply
    768,020.80x = 1,152,031.20 × 643,604.80
  4. Step 4: Simplify right side
    768,020.80x = 741,452,810,069.76
  5. Step 5: Solve for x
    x = 741,452,810,069.76/768,020.80
  6. Step 6: Final answer
    x = 965,407.20

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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.