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Finding the Fourth Proportional to 619,647.40, 929,471.10 and 495,231.40

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Solution

The fourth proportional to 619,647.40, 929,471.10 and 495,231.40 is: 742,847.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,647.40 : 929,471.10 = 495,231.40 : x
  2. Step 2: Convert to fraction form
    619,647.40/929,471.10 = 495,231.40/x
  3. Step 3: Cross multiply
    619,647.40x = 929,471.10 × 495,231.40
  4. Step 4: Simplify right side
    619,647.40x = 460,303,274,112.54
  5. Step 5: Solve for x
    x = 460,303,274,112.54/619,647.40
  6. Step 6: Final answer
    x = 742,847.10

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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.