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Finding the Fourth Proportional to 315,145.51, 434,903.58 and 171,906.19

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Solution

The fourth proportional to 315,145.51, 434,903.58 and 171,906.19 is: 237,232.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,145.51 : 434,903.58 = 171,906.19 : x
  2. Step 2: Convert to fraction form
    315,145.51/434,903.58 = 171,906.19/x
  3. Step 3: Cross multiply
    315,145.51x = 434,903.58 × 171,906.19
  4. Step 4: Simplify right side
    315,145.51x = 74,762,614,421.11
  5. Step 5: Solve for x
    x = 74,762,614,421.11/315,145.51
  6. Step 6: Final answer
    x = 237,232.05

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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.