Home / 636,385,918.28-878,289,019.97-385,482,948.27

Finding the Fourth Proportional to 636,385,918.28, 878,289,019.97 and 385,482,948.27

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Solution

The fourth proportional to 636,385,918.28, 878,289,019.97 and 385,482,948.27 is: 532,012,778.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,385,918.28 : 878,289,019.97 = 385,482,948.27 : x
  2. Step 2: Convert to fraction form
    636,385,918.28/878,289,019.97 = 385,482,948.27/x
  3. Step 3: Cross multiply
    636,385,918.28x = 878,289,019.97 × 385,482,948.27
  4. Step 4: Simplify right side
    636,385,918.28x = 338,565,440,850,638,272
  5. Step 5: Solve for x
    x = 338,565,440,850,638,272/636,385,918.28
  6. Step 6: Final answer
    x = 532,012,778.93

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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.