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Finding the Fourth Proportional to 282,879.54, 390,376.53 and 155,556

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Solution

The fourth proportional to 282,879.54, 390,376.53 and 155,556 is: 214,668.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,879.54 : 390,376.53 = 155,556 : x
  2. Step 2: Convert to fraction form
    282,879.54/390,376.53 = 155,556/x
  3. Step 3: Cross multiply
    282,879.54x = 390,376.53 × 155,556
  4. Step 4: Simplify right side
    282,879.54x = 60,725,411,500.68
  5. Step 5: Solve for x
    x = 60,725,411,500.68/282,879.54
  6. Step 6: Final answer
    x = 214,668.80

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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.