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Finding the Fourth Proportional to 393,420.16, 589,133.70 and 243,952.39

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Solution

The fourth proportional to 393,420.16, 589,133.70 and 243,952.39 is: 365,310.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,420.16 : 589,133.70 = 243,952.39 : x
  2. Step 2: Convert to fraction form
    393,420.16/589,133.70 = 243,952.39/x
  3. Step 3: Cross multiply
    393,420.16x = 589,133.70 × 243,952.39
  4. Step 4: Simplify right side
    393,420.16x = 143,720,574,144.54
  5. Step 5: Solve for x
    x = 143,720,574,144.54/393,420.16
  6. Step 6: Final answer
    x = 365,310.65

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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.