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Finding the Fourth Proportional to 287,336.78, 396,533.78 and 158,284.61

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Solution

The fourth proportional to 287,336.78, 396,533.78 and 158,284.61 is: 218,437.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,336.78 : 396,533.78 = 158,284.61 : x
  2. Step 2: Convert to fraction form
    287,336.78/396,533.78 = 158,284.61/x
  3. Step 3: Cross multiply
    287,336.78x = 396,533.78 × 158,284.61
  4. Step 4: Simplify right side
    287,336.78x = 62,765,191,945.03
  5. Step 5: Solve for x
    x = 62,765,191,945.03/287,336.78
  6. Step 6: Final answer
    x = 218,437.73

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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.