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Finding the Fourth Proportional to 275,392.64, 413,080.32 and 78,400.64

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Solution

The fourth proportional to 275,392.64, 413,080.32 and 78,400.64 is: 117,598.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,392.64 : 413,080.32 = 78,400.64 : x
  2. Step 2: Convert to fraction form
    275,392.64/413,080.32 = 78,400.64/x
  3. Step 3: Cross multiply
    275,392.64x = 413,080.32 × 78,400.64
  4. Step 4: Simplify right side
    275,392.64x = 32,385,761,459.40
  5. Step 5: Solve for x
    x = 32,385,761,459.40/275,392.64
  6. Step 6: Final answer
    x = 117,598.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.