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Finding the Fourth Proportional to 330,665.54, 456,354.09 and 187,410.20

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Solution

The fourth proportional to 330,665.54, 456,354.09 and 187,410.20 is: 258,646.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,665.54 : 456,354.09 = 187,410.20 : x
  2. Step 2: Convert to fraction form
    330,665.54/456,354.09 = 187,410.20/x
  3. Step 3: Cross multiply
    330,665.54x = 456,354.09 × 187,410.20
  4. Step 4: Simplify right side
    330,665.54x = 85,525,408,995.95
  5. Step 5: Solve for x
    x = 85,525,408,995.95/330,665.54
  6. Step 6: Final answer
    x = 258,646.28

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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.