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Finding the Fourth Proportional to 645,000.80, 967,501.20 and 408,610.40

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Solution

The fourth proportional to 645,000.80, 967,501.20 and 408,610.40 is: 612,915.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,000.80 : 967,501.20 = 408,610.40 : x
  2. Step 2: Convert to fraction form
    645,000.80/967,501.20 = 408,610.40/x
  3. Step 3: Cross multiply
    645,000.80x = 967,501.20 × 408,610.40
  4. Step 4: Simplify right side
    645,000.80x = 395,331,052,332.48
  5. Step 5: Solve for x
    x = 395,331,052,332.48/645,000.80
  6. Step 6: Final answer
    x = 612,915.60

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Double scale
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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.