Home / 813,891,390.40-1,220,911,735.20-268,634,123.20

Finding the Fourth Proportional to 813,891,390.40, 1,220,911,735.20 and 268,634,123.20

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Solution

The fourth proportional to 813,891,390.40, 1,220,911,735.20 and 268,634,123.20 is: 402,975,823.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,891,390.40 : 1,220,911,735.20 = 268,634,123.20 : x
  2. Step 2: Convert to fraction form
    813,891,390.40/1,220,911,735.20 = 268,634,123.20/x
  3. Step 3: Cross multiply
    813,891,390.40x = 1,220,911,735.20 × 268,634,123.20
  4. Step 4: Simplify right side
    813,891,390.40x = 327,978,553,490,042,560
  5. Step 5: Solve for x
    x = 327,978,553,490,042,560/813,891,390.40
  6. Step 6: Final answer
    x = 402,975,823.75

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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.