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Finding the Fourth Proportional to 385,619.60, 578,456.88 and 119,345.84

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Solution

The fourth proportional to 385,619.60, 578,456.88 and 119,345.84 is: 179,027.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,619.60 : 578,456.88 = 119,345.84 : x
  2. Step 2: Convert to fraction form
    385,619.60/578,456.88 = 119,345.84/x
  3. Step 3: Cross multiply
    385,619.60x = 578,456.88 × 119,345.84
  4. Step 4: Simplify right side
    385,619.60x = 69,036,422,247.38
  5. Step 5: Solve for x
    x = 69,036,422,247.38/385,619.60
  6. Step 6: Final answer
    x = 179,027.26

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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.