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Finding the Fourth Proportional to 873,904.72, 1,205,985.36 and 491,932.48

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Solution

The fourth proportional to 873,904.72, 1,205,985.36 and 491,932.48 is: 678,865.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,904.72 : 1,205,985.36 = 491,932.48 : x
  2. Step 2: Convert to fraction form
    873,904.72/1,205,985.36 = 491,932.48/x
  3. Step 3: Cross multiply
    873,904.72x = 1,205,985.36 × 491,932.48
  4. Step 4: Simplify right side
    873,904.72x = 593,263,368,988.49
  5. Step 5: Solve for x
    x = 593,263,368,988.49/873,904.72
  6. Step 6: Final answer
    x = 678,865.05

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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.