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Finding the Fourth Proportional to 328,830.80, 493,246.20 and 261,908.60

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Solution

The fourth proportional to 328,830.80, 493,246.20 and 261,908.60 is: 392,862.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,830.80 : 493,246.20 = 261,908.60 : x
  2. Step 2: Convert to fraction form
    328,830.80/493,246.20 = 261,908.60/x
  3. Step 3: Cross multiply
    328,830.80x = 493,246.20 × 261,908.60
  4. Step 4: Simplify right side
    328,830.80x = 129,185,421,697.32
  5. Step 5: Solve for x
    x = 129,185,421,697.32/328,830.80
  6. Step 6: Final answer
    x = 392,862.90

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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.