Home / 645,112.59-890,390.81-409,213.87

Finding the Fourth Proportional to 645,112.59, 890,390.81 and 409,213.87

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Solution

The fourth proportional to 645,112.59, 890,390.81 and 409,213.87 is: 564,801.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,112.59 : 890,390.81 = 409,213.87 : x
  2. Step 2: Convert to fraction form
    645,112.59/890,390.81 = 409,213.87/x
  3. Step 3: Cross multiply
    645,112.59x = 890,390.81 × 409,213.87
  4. Step 4: Simplify right side
    645,112.59x = 364,360,269,172.54
  5. Step 5: Solve for x
    x = 364,360,269,172.54/645,112.59
  6. Step 6: Final answer
    x = 564,801.05

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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.