Home / 402,509.28-555,439.31-221,221.34

Finding the Fourth Proportional to 402,509.28, 555,439.31 and 221,221.34

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Solution

The fourth proportional to 402,509.28, 555,439.31 and 221,221.34 is: 305,272.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,509.28 : 555,439.31 = 221,221.34 : x
  2. Step 2: Convert to fraction form
    402,509.28/555,439.31 = 221,221.34/x
  3. Step 3: Cross multiply
    402,509.28x = 555,439.31 × 221,221.34
  4. Step 4: Simplify right side
    402,509.28x = 122,875,030,600.40
  5. Step 5: Solve for x
    x = 122,875,030,600.40/402,509.28
  6. Step 6: Final answer
    x = 305,272.54

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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.