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Finding the Fourth Proportional to 489,689.60, 734,534.40 and 427,481.60

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Solution

The fourth proportional to 489,689.60, 734,534.40 and 427,481.60 is: 641,222.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,689.60 : 734,534.40 = 427,481.60 : x
  2. Step 2: Convert to fraction form
    489,689.60/734,534.40 = 427,481.60/x
  3. Step 3: Cross multiply
    489,689.60x = 734,534.40 × 427,481.60
  4. Step 4: Simplify right side
    489,689.60x = 313,999,940,567.04
  5. Step 5: Solve for x
    x = 313,999,940,567.04/489,689.60
  6. Step 6: Final answer
    x = 641,222.40

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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.