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Finding the Fourth Proportional to 369,139.80, 551,686.67 and 269,509.80

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Solution

The fourth proportional to 369,139.80, 551,686.67 and 269,509.80 is: 402,787.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,139.80 : 551,686.67 = 269,509.80 : x
  2. Step 2: Convert to fraction form
    369,139.80/551,686.67 = 269,509.80/x
  3. Step 3: Cross multiply
    369,139.80x = 551,686.67 × 269,509.80
  4. Step 4: Simplify right side
    369,139.80x = 148,684,964,768.14
  5. Step 5: Solve for x
    x = 148,684,964,768.14/369,139.80
  6. Step 6: Final answer
    x = 402,787.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.