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Finding the Fourth Proportional to 207,675.80, 311,513.70 and 155,187.80

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Solution

The fourth proportional to 207,675.80, 311,513.70 and 155,187.80 is: 232,781.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,675.80 : 311,513.70 = 155,187.80 : x
  2. Step 2: Convert to fraction form
    207,675.80/311,513.70 = 155,187.80/x
  3. Step 3: Cross multiply
    207,675.80x = 311,513.70 × 155,187.80
  4. Step 4: Simplify right side
    207,675.80x = 48,343,125,772.86
  5. Step 5: Solve for x
    x = 48,343,125,772.86/207,675.80
  6. Step 6: Final answer
    x = 232,781.70

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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.