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Finding the Fourth Proportional to 386,579.80, 579,869.70 and 162,193.60

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Solution

The fourth proportional to 386,579.80, 579,869.70 and 162,193.60 is: 243,290.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,579.80 : 579,869.70 = 162,193.60 : x
  2. Step 2: Convert to fraction form
    386,579.80/579,869.70 = 162,193.60/x
  3. Step 3: Cross multiply
    386,579.80x = 579,869.70 × 162,193.60
  4. Step 4: Simplify right side
    386,579.80x = 94,051,154,173.92
  5. Step 5: Solve for x
    x = 94,051,154,173.92/386,579.80
  6. Step 6: Final answer
    x = 243,290.40

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.