Home / 1,278,002,756.80-1,915,492,480.80-664,271,070.40

Finding the Fourth Proportional to 1,278,002,756.80, 1,915,492,480.80 and 664,271,070.40

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Solution

The fourth proportional to 1,278,002,756.80, 1,915,492,480.80 and 664,271,070.40 is: 995,620,888.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,002,756.80 : 1,915,492,480.80 = 664,271,070.40 : x
  2. Step 2: Convert to fraction form
    1,278,002,756.80/1,915,492,480.80 = 664,271,070.40/x
  3. Step 3: Cross multiply
    1,278,002,756.80x = 1,915,492,480.80 × 664,271,070.40
  4. Step 4: Simplify right side
    1,278,002,756.80x = 1,272,406,240,564,167,424
  5. Step 5: Solve for x
    x = 1,272,406,240,564,167,424/1,278,002,756.80
  6. Step 6: Final answer
    x = 995,620,888.76

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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.