Home / 1,290,296,011.80-1,935,444,017.70-428,653,003.80

Finding the Fourth Proportional to 1,290,296,011.80, 1,935,444,017.70 and 428,653,003.80

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Solution

The fourth proportional to 1,290,296,011.80, 1,935,444,017.70 and 428,653,003.80 is: 642,979,505.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,296,011.80 : 1,935,444,017.70 = 428,653,003.80 : x
  2. Step 2: Convert to fraction form
    1,290,296,011.80/1,935,444,017.70 = 428,653,003.80/x
  3. Step 3: Cross multiply
    1,290,296,011.80x = 1,935,444,017.70 × 428,653,003.80
  4. Step 4: Simplify right side
    1,290,296,011.80x = 829,633,891,873,845,376
  5. Step 5: Solve for x
    x = 829,633,891,873,845,376/1,290,296,011.80
  6. Step 6: Final answer
    x = 642,979,505.70

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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.