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Finding the Fourth Proportional to 358,491.20, 538,903.20 and 307,169.60

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Solution

The fourth proportional to 358,491.20, 538,903.20 and 307,169.60 is: 461,753.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,491.20 : 538,903.20 = 307,169.60 : x
  2. Step 2: Convert to fraction form
    358,491.20/538,903.20 = 307,169.60/x
  3. Step 3: Cross multiply
    358,491.20x = 538,903.20 × 307,169.60
  4. Step 4: Simplify right side
    358,491.20x = 165,534,680,382.72
  5. Step 5: Solve for x
    x = 165,534,680,382.72/358,491.20
  6. Step 6: Final answer
    x = 461,753.82

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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.