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Finding the Fourth Proportional to 282,684.93, 390,100.59 and 155,357.79

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Solution

The fourth proportional to 282,684.93, 390,100.59 and 155,357.79 is: 214,391.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,684.93 : 390,100.59 = 155,357.79 : x
  2. Step 2: Convert to fraction form
    282,684.93/390,100.59 = 155,357.79/x
  3. Step 3: Cross multiply
    282,684.93x = 390,100.59 × 155,357.79
  4. Step 4: Simplify right side
    282,684.93x = 60,605,165,540.10
  5. Step 5: Solve for x
    x = 60,605,165,540.10/282,684.93
  6. Step 6: Final answer
    x = 214,391.21

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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.