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Finding the Fourth Proportional to 289,403.20, 434,104.80 and 79,062.40

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Solution

The fourth proportional to 289,403.20, 434,104.80 and 79,062.40 is: 118,593.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,403.20 : 434,104.80 = 79,062.40 : x
  2. Step 2: Convert to fraction form
    289,403.20/434,104.80 = 79,062.40/x
  3. Step 3: Cross multiply
    289,403.20x = 434,104.80 × 79,062.40
  4. Step 4: Simplify right side
    289,403.20x = 34,321,367,339.52
  5. Step 5: Solve for x
    x = 34,321,367,339.52/289,403.20
  6. Step 6: Final answer
    x = 118,593.60

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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.