Home / 403,013.31-556,158.35-221,721.35

Finding the Fourth Proportional to 403,013.31, 556,158.35 and 221,721.35

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Solution

The fourth proportional to 403,013.31, 556,158.35 and 221,721.35 is: 305,975.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,013.31 : 556,158.35 = 221,721.35 : x
  2. Step 2: Convert to fraction form
    403,013.31/556,158.35 = 221,721.35/x
  3. Step 3: Cross multiply
    403,013.31x = 556,158.35 × 221,721.35
  4. Step 4: Simplify right side
    403,013.31x = 123,312,180,175.77
  5. Step 5: Solve for x
    x = 123,312,180,175.77/403,013.31
  6. Step 6: Final answer
    x = 305,975.45

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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.