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Finding the Fourth Proportional to 493,808.60, 740,737.20 and 257,612.60

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Solution

The fourth proportional to 493,808.60, 740,737.20 and 257,612.60 is: 386,431.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,808.60 : 740,737.20 = 257,612.60 : x
  2. Step 2: Convert to fraction form
    493,808.60/740,737.20 = 257,612.60/x
  3. Step 3: Cross multiply
    493,808.60x = 740,737.20 × 257,612.60
  4. Step 4: Simplify right side
    493,808.60x = 190,823,236,008.72
  5. Step 5: Solve for x
    x = 190,823,236,008.72/493,808.60
  6. Step 6: Final answer
    x = 386,431.58

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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.