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Finding the Fourth Proportional to 393,316.20, 590,411.70 and 243,725.40

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Solution

The fourth proportional to 393,316.20, 590,411.70 and 243,725.40 is: 365,859.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,316.20 : 590,411.70 = 243,725.40 : x
  2. Step 2: Convert to fraction form
    393,316.20/590,411.70 = 243,725.40/x
  3. Step 3: Cross multiply
    393,316.20x = 590,411.70 × 243,725.40
  4. Step 4: Simplify right side
    393,316.20x = 143,898,327,747.18
  5. Step 5: Solve for x
    x = 143,898,327,747.18/393,316.20
  6. Step 6: Final answer
    x = 365,859.14

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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.