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Finding the Fourth Proportional to 208,256.40, 312,384.60 and 185,511.60

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Solution

The fourth proportional to 208,256.40, 312,384.60 and 185,511.60 is: 278,267.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,256.40 : 312,384.60 = 185,511.60 : x
  2. Step 2: Convert to fraction form
    208,256.40/312,384.60 = 185,511.60/x
  3. Step 3: Cross multiply
    208,256.40x = 312,384.60 × 185,511.60
  4. Step 4: Simplify right side
    208,256.40x = 57,950,966,961.36
  5. Step 5: Solve for x
    x = 57,950,966,961.36/208,256.40
  6. Step 6: Final answer
    x = 278,267.40

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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.