Home / 1,221,870.51-1,686,208.28-677,989.13

Finding the Fourth Proportional to 1,221,870.51, 1,686,208.28 and 677,989.13

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Solution

The fourth proportional to 1,221,870.51, 1,686,208.28 and 677,989.13 is: 935,639.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,870.51 : 1,686,208.28 = 677,989.13 : x
  2. Step 2: Convert to fraction form
    1,221,870.51/1,686,208.28 = 677,989.13/x
  3. Step 3: Cross multiply
    1,221,870.51x = 1,686,208.28 × 677,989.13
  4. Step 4: Simplify right side
    1,221,870.51x = 1,143,230,872,935.01
  5. Step 5: Solve for x
    x = 1,143,230,872,935.01/1,221,870.51
  6. Step 6: Final answer
    x = 935,639.96

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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.