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Finding the Fourth Proportional to 712,031.22, 982,602.36 and 389,738.43

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Solution

The fourth proportional to 712,031.22, 982,602.36 and 389,738.43 is: 537,838.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,031.22 : 982,602.36 = 389,738.43 : x
  2. Step 2: Convert to fraction form
    712,031.22/982,602.36 = 389,738.43/x
  3. Step 3: Cross multiply
    712,031.22x = 982,602.36 × 389,738.43
  4. Step 4: Simplify right side
    712,031.22x = 382,957,901,100.70
  5. Step 5: Solve for x
    x = 382,957,901,100.70/712,031.22
  6. Step 6: Final answer
    x = 537,838.64

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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.