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Finding the Fourth Proportional to 282,389.79, 389,698.38 and 155,073.45

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Solution

The fourth proportional to 282,389.79, 389,698.38 and 155,073.45 is: 214,001.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,389.79 : 389,698.38 = 155,073.45 : x
  2. Step 2: Convert to fraction form
    282,389.79/389,698.38 = 155,073.45/x
  3. Step 3: Cross multiply
    282,389.79x = 389,698.38 × 155,073.45
  4. Step 4: Simplify right side
    282,389.79x = 60,431,872,246.01
  5. Step 5: Solve for x
    x = 60,431,872,246.01/282,389.79
  6. Step 6: Final answer
    x = 214,001.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.