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Finding the Fourth Proportional to 807,798.80, 1,210,661.40 and 491,920.40

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Solution

The fourth proportional to 807,798.80, 1,210,661.40 and 491,920.40 is: 737,249.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,798.80 : 1,210,661.40 = 491,920.40 : x
  2. Step 2: Convert to fraction form
    807,798.80/1,210,661.40 = 491,920.40/x
  3. Step 3: Cross multiply
    807,798.80x = 1,210,661.40 × 491,920.40
  4. Step 4: Simplify right side
    807,798.80x = 595,549,040,152.56
  5. Step 5: Solve for x
    x = 595,549,040,152.56/807,798.80
  6. Step 6: Final answer
    x = 737,249.23

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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.