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Finding the Fourth Proportional to 390,020.60, 585,030.90 and 330,233.49

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Solution

The fourth proportional to 390,020.60, 585,030.90 and 330,233.49 is: 495,350.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,020.60 : 585,030.90 = 330,233.49 : x
  2. Step 2: Convert to fraction form
    390,020.60/585,030.90 = 330,233.49/x
  3. Step 3: Cross multiply
    390,020.60x = 585,030.90 × 330,233.49
  4. Step 4: Simplify right side
    390,020.60x = 193,196,795,864.84
  5. Step 5: Solve for x
    x = 193,196,795,864.84/390,020.60
  6. Step 6: Final answer
    x = 495,350.24

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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.