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Finding the Fourth Proportional to 328,072.60, 492,108.90 and 280,833.40

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Solution

The fourth proportional to 328,072.60, 492,108.90 and 280,833.40 is: 421,250.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,072.60 : 492,108.90 = 280,833.40 : x
  2. Step 2: Convert to fraction form
    328,072.60/492,108.90 = 280,833.40/x
  3. Step 3: Cross multiply
    328,072.60x = 492,108.90 × 280,833.40
  4. Step 4: Simplify right side
    328,072.60x = 138,200,615,557.26
  5. Step 5: Solve for x
    x = 138,200,615,557.26/328,072.60
  6. Step 6: Final answer
    x = 421,250.10

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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.