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Finding the Fourth Proportional to 393,000.40, 589,500.60 and 143,779.60

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Solution

The fourth proportional to 393,000.40, 589,500.60 and 143,779.60 is: 215,669.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,000.40 : 589,500.60 = 143,779.60 : x
  2. Step 2: Convert to fraction form
    393,000.40/589,500.60 = 143,779.60/x
  3. Step 3: Cross multiply
    393,000.40x = 589,500.60 × 143,779.60
  4. Step 4: Simplify right side
    393,000.40x = 84,758,160,467.76
  5. Step 5: Solve for x
    x = 84,758,160,467.76/393,000.40
  6. Step 6: Final answer
    x = 215,669.40

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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.