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Finding the Fourth Proportional to 402,750.46, 555,783.88 and 221,462.20

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Solution

The fourth proportional to 402,750.46, 555,783.88 and 221,462.20 is: 305,611.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,750.46 : 555,783.88 = 221,462.20 : x
  2. Step 2: Convert to fraction form
    402,750.46/555,783.88 = 221,462.20/x
  3. Step 3: Cross multiply
    402,750.46x = 555,783.88 × 221,462.20
  4. Step 4: Simplify right side
    402,750.46x = 123,085,116,903.11
  5. Step 5: Solve for x
    x = 123,085,116,903.11/402,750.46
  6. Step 6: Final answer
    x = 305,611.37

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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.