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Finding the Fourth Proportional to 493,343.60, 740,039.70 and 257,147.60

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Solution

The fourth proportional to 493,343.60, 740,039.70 and 257,147.60 is: 385,734.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,343.60 : 740,039.70 = 257,147.60 : x
  2. Step 2: Convert to fraction form
    493,343.60/740,039.70 = 257,147.60/x
  3. Step 3: Cross multiply
    493,343.60x = 740,039.70 × 257,147.60
  4. Step 4: Simplify right side
    493,343.60x = 190,299,432,759.72
  5. Step 5: Solve for x
    x = 190,299,432,759.72/493,343.60
  6. Step 6: Final answer
    x = 385,734.07

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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.