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Finding the Fourth Proportional to 716,017.83, 988,108.12 and 393,748.80

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Solution

The fourth proportional to 716,017.83, 988,108.12 and 393,748.80 is: 543,375.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,017.83 : 988,108.12 = 393,748.80 : x
  2. Step 2: Convert to fraction form
    716,017.83/988,108.12 = 393,748.80/x
  3. Step 3: Cross multiply
    716,017.83x = 988,108.12 × 393,748.80
  4. Step 4: Simplify right side
    716,017.83x = 389,066,381,092.20
  5. Step 5: Solve for x
    x = 389,066,381,092.20/716,017.83
  6. Step 6: Final answer
    x = 543,375.27

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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.