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Finding the Fourth Proportional to 1,242,839.63, 1,855,186.27 and 1,066,479.95

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Solution

The fourth proportional to 1,242,839.63, 1,855,186.27 and 1,066,479.95 is: 1,591,934.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242,839.63 : 1,855,186.27 = 1,066,479.95 : x
  2. Step 2: Convert to fraction form
    1,242,839.63/1,855,186.27 = 1,066,479.95/x
  3. Step 3: Cross multiply
    1,242,839.63x = 1,855,186.27 × 1,066,479.95
  4. Step 4: Simplify right side
    1,242,839.63x = 1,978,518,962,442.05
  5. Step 5: Solve for x
    x = 1,978,518,962,442.05/1,242,839.63
  6. Step 6: Final answer
    x = 1,591,934.24

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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.