Home / 1,221,932.27-1,686,129.71-678,090.98

Finding the Fourth Proportional to 1,221,932.27, 1,686,129.71 and 678,090.98

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Solution

The fourth proportional to 1,221,932.27, 1,686,129.71 and 678,090.98 is: 935,689.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,932.27 : 1,686,129.71 = 678,090.98 : x
  2. Step 2: Convert to fraction form
    1,221,932.27/1,686,129.71 = 678,090.98/x
  3. Step 3: Cross multiply
    1,221,932.27x = 1,686,129.71 × 678,090.98
  4. Step 4: Simplify right side
    1,221,932.27x = 1,143,349,348,285.89
  5. Step 5: Solve for x
    x = 1,143,349,348,285.89/1,221,932.27
  6. Step 6: Final answer
    x = 935,689.62

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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.