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Finding the Fourth Proportional to 780,071.80, 1,169,232.90 and 330,716.20

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Solution

The fourth proportional to 780,071.80, 1,169,232.90 and 330,716.20 is: 495,703.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,071.80 : 1,169,232.90 = 330,716.20 : x
  2. Step 2: Convert to fraction form
    780,071.80/1,169,232.90 = 330,716.20/x
  3. Step 3: Cross multiply
    780,071.80x = 1,169,232.90 × 330,716.20
  4. Step 4: Simplify right side
    780,071.80x = 386,684,261,602.98
  5. Step 5: Solve for x
    x = 386,684,261,602.98/780,071.80
  6. Step 6: Final answer
    x = 495,703.42

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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.