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Finding the Fourth Proportional to 489,269.80, 733,904.70 and 208,815.40

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Solution

The fourth proportional to 489,269.80, 733,904.70 and 208,815.40 is: 313,223.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,269.80 : 733,904.70 = 208,815.40 : x
  2. Step 2: Convert to fraction form
    489,269.80/733,904.70 = 208,815.40/x
  3. Step 3: Cross multiply
    489,269.80x = 733,904.70 × 208,815.40
  4. Step 4: Simplify right side
    489,269.80x = 153,250,603,492.38
  5. Step 5: Solve for x
    x = 153,250,603,492.38/489,269.80
  6. Step 6: Final answer
    x = 313,223.10

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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.