Home / 402,666.35-555,679.91-221,381.36

Finding the Fourth Proportional to 402,666.35, 555,679.91 and 221,381.36

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Solution

The fourth proportional to 402,666.35, 555,679.91 and 221,381.36 is: 305,506.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,666.35 : 555,679.91 = 221,381.36 : x
  2. Step 2: Convert to fraction form
    402,666.35/555,679.91 = 221,381.36/x
  3. Step 3: Cross multiply
    402,666.35x = 555,679.91 × 221,381.36
  4. Step 4: Simplify right side
    402,666.35x = 123,017,174,200.48
  5. Step 5: Solve for x
    x = 123,017,174,200.48/402,666.35
  6. Step 6: Final answer
    x = 305,506.47

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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.