Home / 402,905.98-555,998.65-221,617.91

Finding the Fourth Proportional to 402,905.98, 555,998.65 and 221,617.91

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Solution

The fourth proportional to 402,905.98, 555,998.65 and 221,617.91 is: 305,826.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,905.98 : 555,998.65 = 221,617.91 : x
  2. Step 2: Convert to fraction form
    402,905.98/555,998.65 = 221,617.91/x
  3. Step 3: Cross multiply
    402,905.98x = 555,998.65 × 221,617.91
  4. Step 4: Simplify right side
    402,905.98x = 123,219,256,484.28
  5. Step 5: Solve for x
    x = 123,219,256,484.28/402,905.98
  6. Step 6: Final answer
    x = 305,826.33

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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.