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Finding the Fourth Proportional to 524,648.40, 786,972.60 and 419,672.40

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Solution

The fourth proportional to 524,648.40, 786,972.60 and 419,672.40 is: 629,508.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    524,648.40 : 786,972.60 = 419,672.40 : x
  2. Step 2: Convert to fraction form
    524,648.40/786,972.60 = 419,672.40/x
  3. Step 3: Cross multiply
    524,648.40x = 786,972.60 × 419,672.40
  4. Step 4: Simplify right side
    524,648.40x = 330,270,679,776.24
  5. Step 5: Solve for x
    x = 330,270,679,776.24/524,648.40
  6. Step 6: Final answer
    x = 629,508.60

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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.