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Finding the Fourth Proportional to 385,365.20, 579,430.20 and 324,539.60

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Solution

The fourth proportional to 385,365.20, 579,430.20 and 324,539.60 is: 487,973.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,365.20 : 579,430.20 = 324,539.60 : x
  2. Step 2: Convert to fraction form
    385,365.20/579,430.20 = 324,539.60/x
  3. Step 3: Cross multiply
    385,365.20x = 579,430.20 × 324,539.60
  4. Step 4: Simplify right side
    385,365.20x = 188,048,045,335.92
  5. Step 5: Solve for x
    x = 188,048,045,335.92/385,365.20
  6. Step 6: Final answer
    x = 487,973.60

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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.