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Finding the Fourth Proportional to 315,121.76, 435,028.56 and 243,340.64

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Solution

The fourth proportional to 315,121.76, 435,028.56 and 243,340.64 is: 335,934.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,121.76 : 435,028.56 = 243,340.64 : x
  2. Step 2: Convert to fraction form
    315,121.76/435,028.56 = 243,340.64/x
  3. Step 3: Cross multiply
    315,121.76x = 435,028.56 × 243,340.64
  4. Step 4: Simplify right side
    315,121.76x = 105,860,128,208.68
  5. Step 5: Solve for x
    x = 105,860,128,208.68/315,121.76
  6. Step 6: Final answer
    x = 335,934.05

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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.