Home / 827,032,912.80-1,240,549,369.20-639,779,676.45

Finding the Fourth Proportional to 827,032,912.80, 1,240,549,369.20 and 639,779,676.45

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Solution

The fourth proportional to 827,032,912.80, 1,240,549,369.20 and 639,779,676.45 is: 959,669,514.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,032,912.80 : 1,240,549,369.20 = 639,779,676.45 : x
  2. Step 2: Convert to fraction form
    827,032,912.80/1,240,549,369.20 = 639,779,676.45/x
  3. Step 3: Cross multiply
    827,032,912.80x = 1,240,549,369.20 × 639,779,676.45
  4. Step 4: Simplify right side
    827,032,912.80x = 793,678,274,047,027,712
  5. Step 5: Solve for x
    x = 793,678,274,047,027,712/827,032,912.80
  6. Step 6: Final answer
    x = 959,669,514.68

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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.