Home / 315,455.20-435,325.96-172,215.25

Finding the Fourth Proportional to 315,455.20, 435,325.96 and 172,215.25

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Solution

The fourth proportional to 315,455.20, 435,325.96 and 172,215.25 is: 237,655.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,455.20 : 435,325.96 = 172,215.25 : x
  2. Step 2: Convert to fraction form
    315,455.20/435,325.96 = 172,215.25/x
  3. Step 3: Cross multiply
    315,455.20x = 435,325.96 × 172,215.25
  4. Step 4: Simplify right side
    315,455.20x = 74,969,769,032.89
  5. Step 5: Solve for x
    x = 74,969,769,032.89/315,455.20
  6. Step 6: Final answer
    x = 237,655.84

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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.