Home / 315,848.45-435,872-172,608.56

Finding the Fourth Proportional to 315,848.45, 435,872 and 172,608.56

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Solution

The fourth proportional to 315,848.45, 435,872 and 172,608.56 is: 238,200.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,848.45 : 435,872 = 172,608.56 : x
  2. Step 2: Convert to fraction form
    315,848.45/435,872 = 172,608.56/x
  3. Step 3: Cross multiply
    315,848.45x = 435,872 × 172,608.56
  4. Step 4: Simplify right side
    315,848.45x = 75,235,238,264.32
  5. Step 5: Solve for x
    x = 75,235,238,264.32/315,848.45
  6. Step 6: Final answer
    x = 238,200.44

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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.