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Finding the Fourth Proportional to 490,369.40, 735,554.10 and 407,425.40

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Solution

The fourth proportional to 490,369.40, 735,554.10 and 407,425.40 is: 611,138.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,369.40 : 735,554.10 = 407,425.40 : x
  2. Step 2: Convert to fraction form
    490,369.40/735,554.10 = 407,425.40/x
  3. Step 3: Cross multiply
    490,369.40x = 735,554.10 × 407,425.40
  4. Step 4: Simplify right side
    490,369.40x = 299,683,423,414.14
  5. Step 5: Solve for x
    x = 299,683,423,414.14/490,369.40
  6. Step 6: Final answer
    x = 611,138.10

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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.