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Finding the Fourth Proportional to 315,674.50, 435,628.20 and 172,434.58

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Solution

The fourth proportional to 315,674.50, 435,628.20 and 172,434.58 is: 237,958.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,674.50 : 435,628.20 = 172,434.58 : x
  2. Step 2: Convert to fraction form
    315,674.50/435,628.20 = 172,434.58/x
  3. Step 3: Cross multiply
    315,674.50x = 435,628.20 × 172,434.58
  4. Step 4: Simplify right side
    315,674.50x = 75,117,365,703.16
  5. Step 5: Solve for x
    x = 75,117,365,703.16/315,674.50
  6. Step 6: Final answer
    x = 237,958.29

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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.