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Finding the Fourth Proportional to 260,041.20, 390,061.80 and 207,553.20

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Solution

The fourth proportional to 260,041.20, 390,061.80 and 207,553.20 is: 311,329.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,041.20 : 390,061.80 = 207,553.20 : x
  2. Step 2: Convert to fraction form
    260,041.20/390,061.80 = 207,553.20/x
  3. Step 3: Cross multiply
    260,041.20x = 390,061.80 × 207,553.20
  4. Step 4: Simplify right side
    260,041.20x = 80,958,574,787.76
  5. Step 5: Solve for x
    x = 80,958,574,787.76/260,041.20
  6. Step 6: Final answer
    x = 311,329.80

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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.