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Finding the Fourth Proportional to 493,620.30, 740,430.45 and 455,129.10

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Solution

The fourth proportional to 493,620.30, 740,430.45 and 455,129.10 is: 682,693.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,620.30 : 740,430.45 = 455,129.10 : x
  2. Step 2: Convert to fraction form
    493,620.30/740,430.45 = 455,129.10/x
  3. Step 3: Cross multiply
    493,620.30x = 740,430.45 × 455,129.10
  4. Step 4: Simplify right side
    493,620.30x = 336,991,444,321.10
  5. Step 5: Solve for x
    x = 336,991,444,321.10/493,620.30
  6. Step 6: Final answer
    x = 682,693.65

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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.