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Finding the Fourth Proportional to 655,628, 983,611 and 356,031.68

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Solution

The fourth proportional to 655,628, 983,611 and 356,031.68 is: 534,139.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,628 : 983,611 = 356,031.68 : x
  2. Step 2: Convert to fraction form
    655,628/983,611 = 356,031.68/x
  3. Step 3: Cross multiply
    655,628x = 983,611 × 356,031.68
  4. Step 4: Simplify right side
    655,628x = 350,196,676,796.48
  5. Step 5: Solve for x
    x = 350,196,676,796.48/655,628
  6. Step 6: Final answer
    x = 534,139.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.