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Finding the Fourth Proportional to 786,326.40, 1,179,230.40 and 287,625.60

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Solution

The fourth proportional to 786,326.40, 1,179,230.40 and 287,625.60 is: 431,343.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,326.40 : 1,179,230.40 = 287,625.60 : x
  2. Step 2: Convert to fraction form
    786,326.40/1,179,230.40 = 287,625.60/x
  3. Step 3: Cross multiply
    786,326.40x = 1,179,230.40 × 287,625.60
  4. Step 4: Simplify right side
    786,326.40x = 339,176,851,338.24
  5. Step 5: Solve for x
    x = 339,176,851,338.24/786,326.40
  6. Step 6: Final answer
    x = 431,343.59

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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.