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Finding the Fourth Proportional to 287,645.77, 396,951.60 and 160,318.63

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Solution

The fourth proportional to 287,645.77, 396,951.60 and 160,318.63 is: 221,239.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,645.77 : 396,951.60 = 160,318.63 : x
  2. Step 2: Convert to fraction form
    287,645.77/396,951.60 = 160,318.63/x
  3. Step 3: Cross multiply
    287,645.77x = 396,951.60 × 160,318.63
  4. Step 4: Simplify right side
    287,645.77x = 63,638,736,688.31
  5. Step 5: Solve for x
    x = 63,638,736,688.31/287,645.77
  6. Step 6: Final answer
    x = 221,239.95

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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.