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Finding the Fourth Proportional to 603,739.60, 905,609.40 and 538,421.20

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Solution

The fourth proportional to 603,739.60, 905,609.40 and 538,421.20 is: 807,631.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,739.60 : 905,609.40 = 538,421.20 : x
  2. Step 2: Convert to fraction form
    603,739.60/905,609.40 = 538,421.20/x
  3. Step 3: Cross multiply
    603,739.60x = 905,609.40 × 538,421.20
  4. Step 4: Simplify right side
    603,739.60x = 487,599,299,879.28
  5. Step 5: Solve for x
    x = 487,599,299,879.28/603,739.60
  6. Step 6: Final answer
    x = 807,631.80

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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.