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Finding the Fourth Proportional to 328,220.60, 492,330.90 and 217,412.60

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Solution

The fourth proportional to 328,220.60, 492,330.90 and 217,412.60 is: 326,118.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,220.60 : 492,330.90 = 217,412.60 : x
  2. Step 2: Convert to fraction form
    328,220.60/492,330.90 = 217,412.60/x
  3. Step 3: Cross multiply
    328,220.60x = 492,330.90 × 217,412.60
  4. Step 4: Simplify right side
    328,220.60x = 107,038,941,029.34
  5. Step 5: Solve for x
    x = 107,038,941,029.34/328,220.60
  6. Step 6: Final answer
    x = 326,118.90

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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.