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Finding the Fourth Proportional to 1,178,847, 1,626,808.86 and 642,303

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Solution

The fourth proportional to 1,178,847, 1,626,808.86 and 642,303 is: 886,378.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178,847 : 1,626,808.86 = 642,303 : x
  2. Step 2: Convert to fraction form
    1,178,847/1,626,808.86 = 642,303/x
  3. Step 3: Cross multiply
    1,178,847x = 1,626,808.86 × 642,303
  4. Step 4: Simplify right side
    1,178,847x = 1,044,904,211,204.58
  5. Step 5: Solve for x
    x = 1,044,904,211,204.58/1,178,847
  6. Step 6: Final answer
    x = 886,378.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.