Home / 402,581.10-555,555.69-221,289.15

Finding the Fourth Proportional to 402,581.10, 555,555.69 and 221,289.15

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Solution

The fourth proportional to 402,581.10, 555,555.69 and 221,289.15 is: 305,375.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,581.10 : 555,555.69 = 221,289.15 : x
  2. Step 2: Convert to fraction form
    402,581.10/555,555.69 = 221,289.15/x
  3. Step 3: Cross multiply
    402,581.10x = 555,555.69 × 221,289.15
  4. Step 4: Simplify right side
    402,581.10x = 122,938,446,417.76
  5. Step 5: Solve for x
    x = 122,938,446,417.76/402,581.10
  6. Step 6: Final answer
    x = 305,375.60

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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.