Home / 1,490,310,909.72-2,056,642,656.50-821,279,959.38

Finding the Fourth Proportional to 1,490,310,909.72, 2,056,642,656.50 and 821,279,959.38

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Solution

The fourth proportional to 1,490,310,909.72, 2,056,642,656.50 and 821,279,959.38 is: 1,133,373,839.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490,310,909.72 : 2,056,642,656.50 = 821,279,959.38 : x
  2. Step 2: Convert to fraction form
    1,490,310,909.72/2,056,642,656.50 = 821,279,959.38/x
  3. Step 3: Cross multiply
    1,490,310,909.72x = 2,056,642,656.50 × 821,279,959.38
  4. Step 4: Simplify right side
    1,490,310,909.72x = 1,689,079,397,389,495,296
  5. Step 5: Solve for x
    x = 1,689,079,397,389,495,296/1,490,310,909.72
  6. Step 6: Final answer
    x = 1,133,373,839.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.