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Finding the Fourth Proportional to 287,149.74, 396,614.88 and 210,558.30

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Solution

The fourth proportional to 287,149.74, 396,614.88 and 210,558.30 is: 290,825.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,149.74 : 396,614.88 = 210,558.30 : x
  2. Step 2: Convert to fraction form
    287,149.74/396,614.88 = 210,558.30/x
  3. Step 3: Cross multiply
    287,149.74x = 396,614.88 × 210,558.30
  4. Step 4: Simplify right side
    287,149.74x = 83,510,554,887.50
  5. Step 5: Solve for x
    x = 83,510,554,887.50/287,149.74
  6. Step 6: Final answer
    x = 290,825.81

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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.