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Finding the Fourth Proportional to 301,511.70, 421,591.50 and 301,511.70

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Solution

The fourth proportional to 301,511.70, 421,591.50 and 301,511.70 is: 421,591.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    301,511.70 : 421,591.50 = 301,511.70 : x
  2. Step 2: Convert to fraction form
    301,511.70/421,591.50 = 301,511.70/x
  3. Step 3: Cross multiply
    301,511.70x = 421,591.50 × 301,511.70
  4. Step 4: Simplify right side
    301,511.70x = 127,114,769,870.55
  5. Step 5: Solve for x
    x = 127,114,769,870.55/301,511.70
  6. Step 6: Final answer
    x = 421,591.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.