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Finding the Fourth Proportional to 281,319.48, 388,225.44 and 153,992.88

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Solution

The fourth proportional to 281,319.48, 388,225.44 and 153,992.88 is: 212,512.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,319.48 : 388,225.44 = 153,992.88 : x
  2. Step 2: Convert to fraction form
    281,319.48/388,225.44 = 153,992.88/x
  3. Step 3: Cross multiply
    281,319.48x = 388,225.44 × 153,992.88
  4. Step 4: Simplify right side
    281,319.48x = 59,783,953,594.87
  5. Step 5: Solve for x
    x = 59,783,953,594.87/281,319.48
  6. Step 6: Final answer
    x = 212,512.67

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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.