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Finding the Fourth Proportional to 489,404.60, 734,106.90 and 312,257.60

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Solution

The fourth proportional to 489,404.60, 734,106.90 and 312,257.60 is: 468,386.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,404.60 : 734,106.90 = 312,257.60 : x
  2. Step 2: Convert to fraction form
    489,404.60/734,106.90 = 312,257.60/x
  3. Step 3: Cross multiply
    489,404.60x = 734,106.90 × 312,257.60
  4. Step 4: Simplify right side
    489,404.60x = 229,230,458,737.44
  5. Step 5: Solve for x
    x = 229,230,458,737.44/489,404.60
  6. Step 6: Final answer
    x = 468,386.40

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Similar ratio
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1.5x scale

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.