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Finding the Fourth Proportional to 326,668,492.40, 489,435,868.20 and 211,593,801.20

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Solution

The fourth proportional to 326,668,492.40, 489,435,868.20 and 211,593,801.20 is: 317,023,521.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,668,492.40 : 489,435,868.20 = 211,593,801.20 : x
  2. Step 2: Convert to fraction form
    326,668,492.40/489,435,868.20 = 211,593,801.20/x
  3. Step 3: Cross multiply
    326,668,492.40x = 489,435,868.20 × 211,593,801.20
  4. Step 4: Simplify right side
    326,668,492.40x = 103,561,595,796,060,192
  5. Step 5: Solve for x
    x = 103,561,595,796,060,192/326,668,492.40
  6. Step 6: Final answer
    x = 317,023,521.42

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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.