Home / 402,402.79-555,315.69-221,126.41

Finding the Fourth Proportional to 402,402.79, 555,315.69 and 221,126.41

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Solution

The fourth proportional to 402,402.79, 555,315.69 and 221,126.41 is: 305,154.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,402.79 : 555,315.69 = 221,126.41 : x
  2. Step 2: Convert to fraction form
    402,402.79/555,315.69 = 221,126.41/x
  3. Step 3: Cross multiply
    402,402.79x = 555,315.69 × 221,126.41
  4. Step 4: Simplify right side
    402,402.79x = 122,794,966,469.74
  5. Step 5: Solve for x
    x = 122,794,966,469.74/402,402.79
  6. Step 6: Final answer
    x = 305,154.36

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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.