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Finding the Fourth Proportional to 282,871.52, 390,372.72 and 155,556.80

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Solution

The fourth proportional to 282,871.52, 390,372.72 and 155,556.80 is: 214,673.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,871.52 : 390,372.72 = 155,556.80 : x
  2. Step 2: Convert to fraction form
    282,871.52/390,372.72 = 155,556.80/x
  3. Step 3: Cross multiply
    282,871.52x = 390,372.72 × 155,556.80
  4. Step 4: Simplify right side
    282,871.52x = 60,725,131,130.50
  5. Step 5: Solve for x
    x = 60,725,131,130.50/282,871.52
  6. Step 6: Final answer
    x = 214,673.90

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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.