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Finding the Fourth Proportional to 287,122.95, 396,225.72 and 159,798.60

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Solution

The fourth proportional to 287,122.95, 396,225.72 and 159,798.60 is: 220,519.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,122.95 : 396,225.72 = 159,798.60 : x
  2. Step 2: Convert to fraction form
    287,122.95/396,225.72 = 159,798.60/x
  3. Step 3: Cross multiply
    287,122.95x = 396,225.72 × 159,798.60
  4. Step 4: Simplify right side
    287,122.95x = 63,316,315,339.99
  5. Step 5: Solve for x
    x = 63,316,315,339.99/287,122.95
  6. Step 6: Final answer
    x = 220,519.87

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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.