Home / 639,566,685.90-959,204,997.68-289,581,710.72

Finding the Fourth Proportional to 639,566,685.90, 959,204,997.68 and 289,581,710.72

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Solution

The fourth proportional to 639,566,685.90, 959,204,997.68 and 289,581,710.72 is: 434,306,899.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,566,685.90 : 959,204,997.68 = 289,581,710.72 : x
  2. Step 2: Convert to fraction form
    639,566,685.90/959,204,997.68 = 289,581,710.72/x
  3. Step 3: Cross multiply
    639,566,685.90x = 959,204,997.68 × 289,581,710.72
  4. Step 4: Simplify right side
    639,566,685.90x = 277,768,224,153,104,064
  5. Step 5: Solve for x
    x = 277,768,224,153,104,064/639,566,685.90
  6. Step 6: Final answer
    x = 434,306,899.15

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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.