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Finding the Fourth Proportional to 282,479, 389,821.38 and 155,157.08

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Solution

The fourth proportional to 282,479, 389,821.38 and 155,157.08 is: 214,116.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,479 : 389,821.38 = 155,157.08 : x
  2. Step 2: Convert to fraction form
    282,479/389,821.38 = 155,157.08/x
  3. Step 3: Cross multiply
    282,479x = 389,821.38 × 155,157.08
  4. Step 4: Simplify right side
    282,479x = 60,483,547,042.37
  5. Step 5: Solve for x
    x = 60,483,547,042.37/282,479
  6. Step 6: Final answer
    x = 214,116.97

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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.