Home / 402,720.38-555,739.90-221,431.04

Finding the Fourth Proportional to 402,720.38, 555,739.90 and 221,431.04

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Solution

The fourth proportional to 402,720.38, 555,739.90 and 221,431.04 is: 305,567.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,720.38 : 555,739.90 = 221,431.04 : x
  2. Step 2: Convert to fraction form
    402,720.38/555,739.90 = 221,431.04/x
  3. Step 3: Cross multiply
    402,720.38x = 555,739.90 × 221,431.04
  4. Step 4: Simplify right side
    402,720.38x = 123,058,064,026.50
  5. Step 5: Solve for x
    x = 123,058,064,026.50/402,720.38
  6. Step 6: Final answer
    x = 305,567.01

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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.