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Finding the Fourth Proportional to 283,068.45, 390,640.41 and 155,744.28

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Solution

The fourth proportional to 283,068.45, 390,640.41 and 155,744.28 is: 214,930.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,068.45 : 390,640.41 = 155,744.28 : x
  2. Step 2: Convert to fraction form
    283,068.45/390,640.41 = 155,744.28/x
  3. Step 3: Cross multiply
    283,068.45x = 390,640.41 × 155,744.28
  4. Step 4: Simplify right side
    283,068.45x = 60,840,009,394.35
  5. Step 5: Solve for x
    x = 60,840,009,394.35/283,068.45
  6. Step 6: Final answer
    x = 214,930.38

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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.