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Finding the Fourth Proportional to 289,715.20, 434,572.80 and 171,325.60

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Solution

The fourth proportional to 289,715.20, 434,572.80 and 171,325.60 is: 256,988.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,715.20 : 434,572.80 = 171,325.60 : x
  2. Step 2: Convert to fraction form
    289,715.20/434,572.80 = 171,325.60/x
  3. Step 3: Cross multiply
    289,715.20x = 434,572.80 × 171,325.60
  4. Step 4: Simplify right side
    289,715.20x = 74,453,445,703.68
  5. Step 5: Solve for x
    x = 74,453,445,703.68/289,715.20
  6. Step 6: Final answer
    x = 256,988.40

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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.