Home / 402,749.40-555,779.23-221,450.55

Finding the Fourth Proportional to 402,749.40, 555,779.23 and 221,450.55

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Solution

The fourth proportional to 402,749.40, 555,779.23 and 221,450.55 is: 305,593.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,749.40 : 555,779.23 = 221,450.55 : x
  2. Step 2: Convert to fraction form
    402,749.40/555,779.23 = 221,450.55/x
  3. Step 3: Cross multiply
    402,749.40x = 555,779.23 × 221,450.55
  4. Step 4: Simplify right side
    402,749.40x = 123,077,616,162.08
  5. Step 5: Solve for x
    x = 123,077,616,162.08/402,749.40
  6. Step 6: Final answer
    x = 305,593.54

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1.5x scale

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.