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Finding the Fourth Proportional to 309,611.80, 464,417.70 and 191,513.80

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Solution

The fourth proportional to 309,611.80, 464,417.70 and 191,513.80 is: 287,270.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,611.80 : 464,417.70 = 191,513.80 : x
  2. Step 2: Convert to fraction form
    309,611.80/464,417.70 = 191,513.80/x
  3. Step 3: Cross multiply
    309,611.80x = 464,417.70 × 191,513.80
  4. Step 4: Simplify right side
    309,611.80x = 88,942,398,514.26
  5. Step 5: Solve for x
    x = 88,942,398,514.26/309,611.80
  6. Step 6: Final answer
    x = 287,270.70

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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.