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Finding the Fourth Proportional to 489,325.40, 733,988.10 and 427,117.40

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Solution

The fourth proportional to 489,325.40, 733,988.10 and 427,117.40 is: 640,676.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,325.40 : 733,988.10 = 427,117.40 : x
  2. Step 2: Convert to fraction form
    489,325.40/733,988.10 = 427,117.40/x
  3. Step 3: Cross multiply
    489,325.40x = 733,988.10 × 427,117.40
  4. Step 4: Simplify right side
    489,325.40x = 313,499,088,902.94
  5. Step 5: Solve for x
    x = 313,499,088,902.94/489,325.40
  6. Step 6: Final answer
    x = 640,676.10

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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.