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Finding the Fourth Proportional to 402,820.39, 555,881.03 and 221,532.30

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Solution

The fourth proportional to 402,820.39, 555,881.03 and 221,532.30 is: 305,708.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,820.39 : 555,881.03 = 221,532.30 : x
  2. Step 2: Convert to fraction form
    402,820.39/555,881.03 = 221,532.30/x
  3. Step 3: Cross multiply
    402,820.39x = 555,881.03 × 221,532.30
  4. Step 4: Simplify right side
    402,820.39x = 123,145,602,825.35
  5. Step 5: Solve for x
    x = 123,145,602,825.35/402,820.39
  6. Step 6: Final answer
    x = 305,708.46

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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.