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Finding the Fourth Proportional to 289,613.20, 434,549.40 and 131,760.40

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Solution

The fourth proportional to 289,613.20, 434,549.40 and 131,760.40 is: 197,699.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,613.20 : 434,549.40 = 131,760.40 : x
  2. Step 2: Convert to fraction form
    289,613.20/434,549.40 = 131,760.40/x
  3. Step 3: Cross multiply
    289,613.20x = 434,549.40 × 131,760.40
  4. Step 4: Simplify right side
    289,613.20x = 57,256,402,763.76
  5. Step 5: Solve for x
    x = 57,256,402,763.76/289,613.20
  6. Step 6: Final answer
    x = 197,699.56

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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.