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Finding the Fourth Proportional to 847.15, 1,168.49 and 497.63

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Solution

The fourth proportional to 847.15, 1,168.49 and 497.63 is: 686.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.15 : 1,168.49 = 497.63 : x
  2. Step 2: Convert to fraction form
    847.15/1,168.49 = 497.63/x
  3. Step 3: Cross multiply
    847.15x = 1,168.49 × 497.63
  4. Step 4: Simplify right side
    847.15x = 581,479.84
  5. Step 5: Solve for x
    x = 581,479.84/847.15
  6. Step 6: Final answer
    x = 686.40

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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.