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Finding the Fourth Proportional to 839,802.40, 1,259,780.40 and 341,063.20

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Solution

The fourth proportional to 839,802.40, 1,259,780.40 and 341,063.20 is: 511,625.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,802.40 : 1,259,780.40 = 341,063.20 : x
  2. Step 2: Convert to fraction form
    839,802.40/1,259,780.40 = 341,063.20/x
  3. Step 3: Cross multiply
    839,802.40x = 1,259,780.40 × 341,063.20
  4. Step 4: Simplify right side
    839,802.40x = 429,664,734,521.28
  5. Step 5: Solve for x
    x = 429,664,734,521.28/839,802.40
  6. Step 6: Final answer
    x = 511,625.99

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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.