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Finding the Fourth Proportional to 493,347.60, 740,021.40 and 431,139.60

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Solution

The fourth proportional to 493,347.60, 740,021.40 and 431,139.60 is: 646,709.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,347.60 : 740,021.40 = 431,139.60 : x
  2. Step 2: Convert to fraction form
    493,347.60/740,021.40 = 431,139.60/x
  3. Step 3: Cross multiply
    493,347.60x = 740,021.40 × 431,139.60
  4. Step 4: Simplify right side
    493,347.60x = 319,052,530,387.44
  5. Step 5: Solve for x
    x = 319,052,530,387.44/493,347.60
  6. Step 6: Final answer
    x = 646,709.40

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Double scale
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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.