Home / 876,706,380.05-1,209,811,811.78-480,231,128.66

Finding the Fourth Proportional to 876,706,380.05, 1,209,811,811.78 and 480,231,128.66

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Solution

The fourth proportional to 876,706,380.05, 1,209,811,811.78 and 480,231,128.66 is: 662,695,407.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,706,380.05 : 1,209,811,811.78 = 480,231,128.66 : x
  2. Step 2: Convert to fraction form
    876,706,380.05/1,209,811,811.78 = 480,231,128.66/x
  3. Step 3: Cross multiply
    876,706,380.05x = 1,209,811,811.78 × 480,231,128.66
  4. Step 4: Simplify right side
    876,706,380.05x = 580,989,291,834,907,776
  5. Step 5: Solve for x
    x = 580,989,291,834,907,776/876,706,380.05
  6. Step 6: Final answer
    x = 662,695,407.56

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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.