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Finding the Fourth Proportional to 642,408.82, 963,239.70 and 243,080.44

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Solution

The fourth proportional to 642,408.82, 963,239.70 and 243,080.44 is: 364,479.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,408.82 : 963,239.70 = 243,080.44 : x
  2. Step 2: Convert to fraction form
    642,408.82/963,239.70 = 243,080.44/x
  3. Step 3: Cross multiply
    642,408.82x = 963,239.70 × 243,080.44
  4. Step 4: Simplify right side
    642,408.82x = 234,144,730,101.47
  5. Step 5: Solve for x
    x = 234,144,730,101.47/642,408.82
  6. Step 6: Final answer
    x = 364,479.32

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1.5x scale

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.