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Finding the Fourth Proportional to 287,137.50, 396,242.74 and 158,074.92

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Solution

The fourth proportional to 287,137.50, 396,242.74 and 158,074.92 is: 218,139.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,137.50 : 396,242.74 = 158,074.92 : x
  2. Step 2: Convert to fraction form
    287,137.50/396,242.74 = 158,074.92/x
  3. Step 3: Cross multiply
    287,137.50x = 396,242.74 × 158,074.92
  4. Step 4: Simplify right side
    287,137.50x = 62,636,039,426.08
  5. Step 5: Solve for x
    x = 62,636,039,426.08/287,137.50
  6. Step 6: Final answer
    x = 218,139.53

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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.