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Finding the Fourth Proportional to 631,358.40, 871,295.52 and 344,905.20

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Solution

The fourth proportional to 631,358.40, 871,295.52 and 344,905.20 is: 475,980.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,358.40 : 871,295.52 = 344,905.20 : x
  2. Step 2: Convert to fraction form
    631,358.40/871,295.52 = 344,905.20/x
  3. Step 3: Cross multiply
    631,358.40x = 871,295.52 × 344,905.20
  4. Step 4: Simplify right side
    631,358.40x = 300,514,355,584.70
  5. Step 5: Solve for x
    x = 300,514,355,584.70/631,358.40
  6. Step 6: Final answer
    x = 475,980.61

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.