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Finding the Fourth Proportional to 1,186,799.86, 1,637,777.04 and 642,946.24

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Solution

The fourth proportional to 1,186,799.86, 1,637,777.04 and 642,946.24 is: 887,262.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186,799.86 : 1,637,777.04 = 642,946.24 : x
  2. Step 2: Convert to fraction form
    1,186,799.86/1,637,777.04 = 642,946.24/x
  3. Step 3: Cross multiply
    1,186,799.86x = 1,637,777.04 × 642,946.24
  4. Step 4: Simplify right side
    1,186,799.86x = 1,053,002,589,826.33
  5. Step 5: Solve for x
    x = 1,053,002,589,826.33/1,186,799.86
  6. Step 6: Final answer
    x = 887,262.15

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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.