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Finding the Fourth Proportional to 282,879.52, 390,383.76 and 155,564.80

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Solution

The fourth proportional to 282,879.52, 390,383.76 and 155,564.80 is: 214,684.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,879.52 : 390,383.76 = 155,564.80 : x
  2. Step 2: Convert to fraction form
    282,879.52/390,383.76 = 155,564.80/x
  3. Step 3: Cross multiply
    282,879.52x = 390,383.76 × 155,564.80
  4. Step 4: Simplify right side
    282,879.52x = 60,729,971,547.65
  5. Step 5: Solve for x
    x = 60,729,971,547.65/282,879.52
  6. Step 6: Final answer
    x = 214,684.94

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1.5x scale

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.