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Finding the Fourth Proportional to 340,511.70, 509,989.95 and 200,543.70

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Solution

The fourth proportional to 340,511.70, 509,989.95 and 200,543.70 is: 300,357.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,511.70 : 509,989.95 = 200,543.70 : x
  2. Step 2: Convert to fraction form
    340,511.70/509,989.95 = 200,543.70/x
  3. Step 3: Cross multiply
    340,511.70x = 509,989.95 × 200,543.70
  4. Step 4: Simplify right side
    340,511.70x = 102,275,271,535.82
  5. Step 5: Solve for x
    x = 102,275,271,535.82/340,511.70
  6. Step 6: Final answer
    x = 300,357.58

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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.