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Finding the Fourth Proportional to 260,463.72, 390,754.50 and 82,980.84

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Solution

The fourth proportional to 260,463.72, 390,754.50 and 82,980.84 is: 124,490.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,463.72 : 390,754.50 = 82,980.84 : x
  2. Step 2: Convert to fraction form
    260,463.72/390,754.50 = 82,980.84/x
  3. Step 3: Cross multiply
    260,463.72x = 390,754.50 × 82,980.84
  4. Step 4: Simplify right side
    260,463.72x = 32,425,136,643.78
  5. Step 5: Solve for x
    x = 32,425,136,643.78/260,463.72
  6. Step 6: Final answer
    x = 124,490.03

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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.