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Finding the Fourth Proportional to 280,235.70, 386,733.80 and 159,394.37

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Solution

The fourth proportional to 280,235.70, 386,733.80 and 159,394.37 is: 219,969.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,235.70 : 386,733.80 = 159,394.37 : x
  2. Step 2: Convert to fraction form
    280,235.70/386,733.80 = 159,394.37/x
  3. Step 3: Cross multiply
    280,235.70x = 386,733.80 × 159,394.37
  4. Step 4: Simplify right side
    280,235.70x = 61,643,187,678.07
  5. Step 5: Solve for x
    x = 61,643,187,678.07/280,235.70
  6. Step 6: Final answer
    x = 219,969.07

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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.