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Finding the Fourth Proportional to 315,238.20, 472,079.70 and 209,484.60

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Solution

The fourth proportional to 315,238.20, 472,079.70 and 209,484.60 is: 313,710.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,238.20 : 472,079.70 = 209,484.60 : x
  2. Step 2: Convert to fraction form
    315,238.20/472,079.70 = 209,484.60/x
  3. Step 3: Cross multiply
    315,238.20x = 472,079.70 × 209,484.60
  4. Step 4: Simplify right side
    315,238.20x = 98,893,427,122.62
  5. Step 5: Solve for x
    x = 98,893,427,122.62/315,238.20
  6. Step 6: Final answer
    x = 313,710.16

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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.