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Finding the Fourth Proportional to 380,555.25, 570,866.59 and 100,072.50

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Solution

The fourth proportional to 380,555.25, 570,866.59 and 100,072.50 is: 150,117.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,555.25 : 570,866.59 = 100,072.50 : x
  2. Step 2: Convert to fraction form
    380,555.25/570,866.59 = 100,072.50/x
  3. Step 3: Cross multiply
    380,555.25x = 570,866.59 × 100,072.50
  4. Step 4: Simplify right side
    380,555.25x = 57,128,046,827.78
  5. Step 5: Solve for x
    x = 57,128,046,827.78/380,555.25
  6. Step 6: Final answer
    x = 150,117.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.