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Finding the Fourth Proportional to 330,840.45, 456,643.13 and 187,686.45

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Solution

The fourth proportional to 330,840.45, 456,643.13 and 187,686.45 is: 259,054.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,840.45 : 456,643.13 = 187,686.45 : x
  2. Step 2: Convert to fraction form
    330,840.45/456,643.13 = 187,686.45/x
  3. Step 3: Cross multiply
    330,840.45x = 456,643.13 × 187,686.45
  4. Step 4: Simplify right side
    330,840.45x = 85,705,727,048.16
  5. Step 5: Solve for x
    x = 85,705,727,048.16/330,840.45
  6. Step 6: Final answer
    x = 259,054.56

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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.