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Finding the Fourth Proportional to 315,314.20, 472,193.70 and 209,560.60

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Solution

The fourth proportional to 315,314.20, 472,193.70 and 209,560.60 is: 313,824.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,314.20 : 472,193.70 = 209,560.60 : x
  2. Step 2: Convert to fraction form
    315,314.20/472,193.70 = 209,560.60/x
  3. Step 3: Cross multiply
    315,314.20x = 472,193.70 × 209,560.60
  4. Step 4: Simplify right side
    315,314.20x = 98,953,195,088.22
  5. Step 5: Solve for x
    x = 98,953,195,088.22/315,314.20
  6. Step 6: Final answer
    x = 313,824.10

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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.