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Finding the Fourth Proportional to 603,717.70, 905,576.55 and 426,570.70

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Solution

The fourth proportional to 603,717.70, 905,576.55 and 426,570.70 is: 639,856.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,717.70 : 905,576.55 = 426,570.70 : x
  2. Step 2: Convert to fraction form
    603,717.70/905,576.55 = 426,570.70/x
  3. Step 3: Cross multiply
    603,717.70x = 905,576.55 × 426,570.70
  4. Step 4: Simplify right side
    603,717.70x = 386,292,422,837.09
  5. Step 5: Solve for x
    x = 386,292,422,837.09/603,717.70
  6. Step 6: Final answer
    x = 639,856.05

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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.