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Finding the Fourth Proportional to 315,347.20, 472,243.20 and 209,593.60

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Solution

The fourth proportional to 315,347.20, 472,243.20 and 209,593.60 is: 313,873.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,347.20 : 472,243.20 = 209,593.60 : x
  2. Step 2: Convert to fraction form
    315,347.20/472,243.20 = 209,593.60/x
  3. Step 3: Cross multiply
    315,347.20x = 472,243.20 × 209,593.60
  4. Step 4: Simplify right side
    315,347.20x = 98,979,152,363.52
  5. Step 5: Solve for x
    x = 98,979,152,363.52/315,347.20
  6. Step 6: Final answer
    x = 313,873.57

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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.