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Finding the Fourth Proportional to 315,190.76, 435,123.78 and 243,409.64

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Solution

The fourth proportional to 315,190.76, 435,123.78 and 243,409.64 is: 336,029.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,190.76 : 435,123.78 = 243,409.64 : x
  2. Step 2: Convert to fraction form
    315,190.76/435,123.78 = 243,409.64/x
  3. Step 3: Cross multiply
    315,190.76x = 435,123.78 × 243,409.64
  4. Step 4: Simplify right side
    315,190.76x = 105,913,322,645.24
  5. Step 5: Solve for x
    x = 105,913,322,645.24/315,190.76
  6. Step 6: Final answer
    x = 336,029.28

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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.