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Finding the Fourth Proportional to 489,099.70, 683,339.90 and 489,099.70

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Solution

The fourth proportional to 489,099.70, 683,339.90 and 489,099.70 is: 683,339.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,099.70 : 683,339.90 = 489,099.70 : x
  2. Step 2: Convert to fraction form
    489,099.70/683,339.90 = 489,099.70/x
  3. Step 3: Cross multiply
    489,099.70x = 683,339.90 × 489,099.70
  4. Step 4: Simplify right side
    489,099.70x = 334,221,340,088.03
  5. Step 5: Solve for x
    x = 334,221,340,088.03/489,099.70
  6. Step 6: Final answer
    x = 683,339.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.