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Finding the Fourth Proportional to 289,078.60, 433,358.70 and 257,585.80

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Solution

The fourth proportional to 289,078.60, 433,358.70 and 257,585.80 is: 386,147.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,078.60 : 433,358.70 = 257,585.80 : x
  2. Step 2: Convert to fraction form
    289,078.60/433,358.70 = 257,585.80/x
  3. Step 3: Cross multiply
    289,078.60x = 433,358.70 × 257,585.80
  4. Step 4: Simplify right side
    289,078.60x = 111,627,047,426.46
  5. Step 5: Solve for x
    x = 111,627,047,426.46/289,078.60
  6. Step 6: Final answer
    x = 386,147.74

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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.