Home / 520,845,001.28-718,439,156-309,001,851.44

Finding the Fourth Proportional to 520,845,001.28, 718,439,156 and 309,001,851.44

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Solution

The fourth proportional to 520,845,001.28, 718,439,156 and 309,001,851.44 is: 426,228,587.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,845,001.28 : 718,439,156 = 309,001,851.44 : x
  2. Step 2: Convert to fraction form
    520,845,001.28/718,439,156 = 309,001,851.44/x
  3. Step 3: Cross multiply
    520,845,001.28x = 718,439,156 × 309,001,851.44
  4. Step 4: Simplify right side
    520,845,001.28x = 221,999,029,350,990,976
  5. Step 5: Solve for x
    x = 221,999,029,350,990,976/520,845,001.28
  6. Step 6: Final answer
    x = 426,228,587.79

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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.