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Finding the Fourth Proportional to 328,087.40, 492,422.70 and 280,848.20

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Solution

The fourth proportional to 328,087.40, 492,422.70 and 280,848.20 is: 421,521.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,087.40 : 492,422.70 = 280,848.20 : x
  2. Step 2: Convert to fraction form
    328,087.40/492,422.70 = 280,848.20/x
  3. Step 3: Cross multiply
    328,087.40x = 492,422.70 × 280,848.20
  4. Step 4: Simplify right side
    328,087.40x = 138,296,028,934.14
  5. Step 5: Solve for x
    x = 138,296,028,934.14/328,087.40
  6. Step 6: Final answer
    x = 421,521.91

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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.