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Finding the Fourth Proportional to 665,756.61, 998,642.21 and 192,446.07

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Solution

The fourth proportional to 665,756.61, 998,642.21 and 192,446.07 is: 288,671.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,756.61 : 998,642.21 = 192,446.07 : x
  2. Step 2: Convert to fraction form
    665,756.61/998,642.21 = 192,446.07/x
  3. Step 3: Cross multiply
    665,756.61x = 998,642.21 × 192,446.07
  4. Step 4: Simplify right side
    665,756.61x = 192,184,767,688.38
  5. Step 5: Solve for x
    x = 192,184,767,688.38/665,756.61
  6. Step 6: Final answer
    x = 288,671.21

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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.