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Finding the Fourth Proportional to 315,465.21, 435,348.27 and 172,225.80

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Solution

The fourth proportional to 315,465.21, 435,348.27 and 172,225.80 is: 237,675.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,465.21 : 435,348.27 = 172,225.80 : x
  2. Step 2: Convert to fraction form
    315,465.21/435,348.27 = 172,225.80/x
  3. Step 3: Cross multiply
    315,465.21x = 435,348.27 × 172,225.80
  4. Step 4: Simplify right side
    315,465.21x = 74,978,204,079.37
  5. Step 5: Solve for x
    x = 74,978,204,079.37/315,465.21
  6. Step 6: Final answer
    x = 237,675.03

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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.