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Finding the Fourth Proportional to 281,481.92, 388,445.64 and 152,421.80

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Solution

The fourth proportional to 281,481.92, 388,445.64 and 152,421.80 is: 210,342.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,481.92 : 388,445.64 = 152,421.80 : x
  2. Step 2: Convert to fraction form
    281,481.92/388,445.64 = 152,421.80/x
  3. Step 3: Cross multiply
    281,481.92x = 388,445.64 × 152,421.80
  4. Step 4: Simplify right side
    281,481.92x = 59,207,583,650.95
  5. Step 5: Solve for x
    x = 59,207,583,650.95/281,481.92
  6. Step 6: Final answer
    x = 210,342.40

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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.