Home / 918,511,239.17-1,377,383,776.65-288,080,870.78

Finding the Fourth Proportional to 918,511,239.17, 1,377,383,776.65 and 288,080,870.78

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Solution

The fourth proportional to 918,511,239.17, 1,377,383,776.65 and 288,080,870.78 is: 432,001,156.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,511,239.17 : 1,377,383,776.65 = 288,080,870.78 : x
  2. Step 2: Convert to fraction form
    918,511,239.17/1,377,383,776.65 = 288,080,870.78/x
  3. Step 3: Cross multiply
    918,511,239.17x = 1,377,383,776.65 × 288,080,870.78
  4. Step 4: Simplify right side
    918,511,239.17x = 396,797,917,779,020,544
  5. Step 5: Solve for x
    x = 396,797,917,779,020,544/918,511,239.17
  6. Step 6: Final answer
    x = 432,001,156.72

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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.