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Finding the Fourth Proportional to 289,807.60, 434,711.40 and 247,817.20

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Solution

The fourth proportional to 289,807.60, 434,711.40 and 247,817.20 is: 371,725.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,807.60 : 434,711.40 = 247,817.20 : x
  2. Step 2: Convert to fraction form
    289,807.60/434,711.40 = 247,817.20/x
  3. Step 3: Cross multiply
    289,807.60x = 434,711.40 × 247,817.20
  4. Step 4: Simplify right side
    289,807.60x = 107,728,961,956.08
  5. Step 5: Solve for x
    x = 107,728,961,956.08/289,807.60
  6. Step 6: Final answer
    x = 371,725.80

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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.